Drop the separate Button= assignment

Let's infer that data from the [Buttons] group - we require every tablet
with buttons to define that group anyway.

data/bamboo-0fg-m-p-alt.tablet

@@ -52,7 +52,6 @@ Layout=bamboo-0fg-s-p-alt.svg
 Stylus=true
 Reversible=false
 Touch=false
-Buttons=4
 Ring=true
 
 [Buttons]

data/bamboo-0fg-s-p-alt.tablet

@@ -53,7 +53,6 @@ Layout=bamboo-0fg-s-p-alt.svg
 Stylus=true
 Reversible=false
 Touch=false
-Buttons=4
 Ring=true
 
 [Buttons]

data/bamboo-0fg-s-p.tablet

@@ -53,7 +53,6 @@ Layout=bamboo-0fg-s-p.svg
 Stylus=true
 Reversible=false
 Touch=false
-Buttons=4
 Ring=true
 
 [Buttons]

data/bamboo-16fg-m-pt.tablet

@@ -22,7 +22,6 @@ IntegratedIn=
 Stylus=true
 Reversible=true
 Touch=true
-Buttons=4
 
 [Buttons]
 Left=A;B;C;D

data/bamboo-16fg-s-p.tablet

@@ -21,5 +21,4 @@ IntegratedIn=
 Stylus=true
 Reversible=true
 Touch=false
-Buttons=0
 EvdevCodes=BTN_LEFT;BTN_FORWARD;BTN_BACK;BTN_RIGHT

data/bamboo-16fg-s-pt.tablet

@@ -22,7 +22,6 @@ IntegratedIn=
 Stylus=true
 Reversible=true
 Touch=true
-Buttons=4
 
 [Buttons]
 Left=A;B;C;D

data/bamboo-16fg-s-t.tablet

@@ -21,7 +21,6 @@ IntegratedIn=
 Stylus=true
 Reversible=true
 Touch=true
-Buttons=4
 
 [Buttons]
 Left=A;B;C;D

data/bamboo-2fg-fun-m-pt.tablet

@@ -34,7 +34,6 @@ IntegratedIn=
 Stylus=true
 Reversible=true
 Touch=true
-Buttons=4
 
 [Buttons]
 Left=A;B;C;D

data/bamboo-2fg-fun-s-pt.tablet

@@ -34,7 +34,6 @@ IntegratedIn=
 Stylus=true
 Reversible=true
 Touch=true
-Buttons=4
 
 [Buttons]
 Left=A;B;C;D

data/bamboo-2fg-m-p.tablet

@@ -21,4 +21,3 @@ IntegratedIn=
 Stylus=true
 Reversible=true
 Touch=false
-Buttons=0

data/bamboo-2fg-s-p.tablet

@@ -21,4 +21,3 @@ IntegratedIn=
 Stylus=true
 Reversible=true
 Touch=false
-Buttons=0

data/bamboo-2fg-s-pt.tablet

@@ -34,7 +34,6 @@ IntegratedIn=
 Stylus=true
 Reversible=true
 Touch=true
-Buttons=4
 
 [Buttons]
 Left=A;B;C;D

data/bamboo-2fg-s-t.tablet

@@ -33,7 +33,6 @@ IntegratedIn=
 Stylus=false
 Reversible=true
 Touch=true
-Buttons=4
 
 [Buttons]
 Left=A;B;C;D

data/bamboo-4fg-fun-m.tablet

@@ -22,7 +22,6 @@ IntegratedIn=
 Stylus=true
 Reversible=true
 Touch=true
-Buttons=4
 
 [Buttons]
 Left=A;B;C;D

data/bamboo-4fg-fun-s.tablet

@@ -22,7 +22,6 @@ IntegratedIn=
 Stylus=true
 Reversible=true
 Touch=true
-Buttons=4
 
 [Buttons]
 Left=A;B;C;D

data/bamboo-4fg-s-pt.tablet

@@ -22,7 +22,6 @@ IntegratedIn=
 Stylus=true
 Reversible=true
 Touch=true
-Buttons=4
 
 [Buttons]
 Left=A;B;C;D

data/bamboo-4fg-s-t.tablet

@@ -21,7 +21,6 @@ IntegratedIn=
 Stylus=false
 Reversible=true
 Touch=true
-Buttons=4
 
 [Buttons]
 Left=A;B;C;D

data/bamboo-4fg-se-m-pt.tablet

@@ -22,7 +22,6 @@ IntegratedIn=
 Stylus=true
 Reversible=true
 Touch=true
-Buttons=4
 
 [Buttons]
 Left=A;B;C;D

data/bamboo-4fg-se-s-pt.tablet

@@ -22,7 +22,6 @@ IntegratedIn=
 Stylus=true
 Reversible=true
 Touch=true
-Buttons=4
 
 [Buttons]
 Left=A;B;C;D

data/bamboo-one-m-p.tablet

@@ -17,4 +17,3 @@ IntegratedIn=
 [Features]
 Stylus=true
 Touch=false
-Buttons=0

data/bamboo-one.tablet

@@ -17,4 +17,3 @@ Stylus=true
 Touch=false
 Ring=false
 NumStrips=0
-Buttons=0

data/bamboo-pad-wireless.tablet

@@ -17,7 +17,6 @@ Layout=bamboo-pad.svg
 Stylus=true
 Reversible=false
 Touch=true
-Buttons=2
 
 [Buttons]
 Bottom=A;B

data/bamboo-pad.tablet

@@ -17,7 +17,6 @@ Layout=bamboo-pad.svg
 Stylus=true
 Reversible=false
 Touch=true
-Buttons=2
 
 [Buttons]
 Bottom=A;B

data/chuwi-minibookx.tablet

@@ -16,4 +16,3 @@ Styli=0x621
 [Features]
 Stylus=true
 Touch=true
-Buttons=0

data/cintiq-12wx.tablet

@@ -44,7 +44,6 @@ IntegratedIn=Display
 [Features]
 Stylus=true
 NumStrips=2
-Buttons=10
 
 [Buttons]
 Left=A;B;C;D;I

data/cintiq-13hd.tablet

@@ -37,7 +37,6 @@ Stylus=true
 Reversible=false
 Touch=false
 Ring=false
-Buttons=9
 
 [Buttons]
 Left=B;C;G;H;A;F;I;D;E

data/cintiq-13hdt.tablet

@@ -39,7 +39,6 @@ Stylus=true
 Reversible=false
 Touch=true
 Ring=false
-Buttons=9
 
 [Buttons]
 Left=B;C;G;H;A;F;I;D;E

data/cintiq-16-2.tablet

@@ -18,4 +18,3 @@ Stylus=true
 Reversible=false
 Touch=false
 Ring=false
-Buttons=0

data/cintiq-16.tablet

@@ -18,4 +18,3 @@ Stylus=true
 Reversible=false
 Touch=false
 Ring=false
-Buttons=0

data/cintiq-20wsx.tablet

@@ -48,7 +48,6 @@ IntegratedIn=Display
 Reversible=false
 Stylus=true
 NumStrips=2
-Buttons=14
 
 [Buttons]
 Left=A;B;C;D;I;K;L

data/cintiq-21ux.tablet

@@ -41,7 +41,6 @@ IntegratedIn=Display
 Reversible=false
 Stylus=true
 NumStrips=2
-Buttons=8
 
 [Buttons]
 Left=A;B;C;D

data/cintiq-21ux2.tablet

@@ -57,7 +57,6 @@ IntegratedIn=Display
 Stylus=true
 Ring=false
 NumStrips=2
-Buttons=18
 StatusLEDs=Touchstrip2;Touchstrip
 
 [Buttons]

data/cintiq-22.tablet

@@ -18,4 +18,3 @@ Stylus=true
 Reversible=false
 Touch=false
 Ring=false
-Buttons=0

data/cintiq-22hd.tablet

@@ -47,7 +47,6 @@ Reversible=false
 Touch=false
 Ring=false
 NumStrips=2
-Buttons=18
 
 [Buttons]
 Left=B;C;D;E;A;F;G;H;I

data/cintiq-22hdt.tablet

@@ -49,7 +49,6 @@ Reversible=false
 Touch=true
 Ring=false
 NumStrips=2
-Buttons=18
 
 [Buttons]
 Left=B;C;D;E;A;F;G;H;I

data/cintiq-24hd-touch.tablet

@@ -55,7 +55,6 @@ IntegratedIn=Display
 Stylus=true
 Reversible=false
 Touch=true
-Buttons=16
 Ring=true
 Ring2=true
 StatusLEDs=Ring2;Ring

data/cintiq-24hd.tablet

@@ -53,7 +53,6 @@ IntegratedIn=Display
 Stylus=true
 Reversible=false
 Touch=false
-Buttons=16
 Ring=true
 Ring2=true
 StatusLEDs=Ring2;Ring

data/cintiq-27hd.tablet

@@ -17,6 +17,5 @@ IntegratedIn=Display
 Stylus=true
 Reversible=false
 Touch=false
-Buttons=0
 Ring=false
 Ring2=false

data/cintiq-27hdt.tablet

@@ -19,6 +19,5 @@ IntegratedIn=Display
 Stylus=true
 Reversible=false
 Touch=true
-Buttons=0
 Ring=false
 Ring2=false

data/cintiq-companion-2.tablet

@@ -42,7 +42,6 @@ IntegratedIn=Display;System
 Stylus=true
 Touch=true
 Ring=false
-Buttons=11
 
 [Buttons]
 Left=A;B;C;D;E;F;G;H;I;J;K

data/cintiq-companion-hybrid.tablet

@@ -41,7 +41,6 @@ Stylus=true
 Reversible=false
 Touch=true
 Ring=false
-Buttons=9
 
 [Buttons]
 Left=B;C;G;H;A;F;I;D;E

data/cintiq-companion.tablet

@@ -40,7 +40,6 @@ IntegratedIn=Display;System
 Stylus=true
 Touch=true
 Ring=false
-Buttons=9
 
 [Buttons]
 Left=B;C;G;H;A;F;I;D;E

data/cintiq-pro-13.tablet

@@ -43,4 +43,3 @@ Stylus=true
 Reversible=false
 Touch=true
 Ring=false
-Buttons=0

data/cintiq-pro-16-2.tablet

@@ -40,7 +40,6 @@ Stylus=true
 Reversible=false
 Touch=true
 Ring=false
-Buttons=8
 
 [Buttons]
 Left=A;B;C;D

data/cintiq-pro-16.tablet

@@ -43,4 +43,3 @@ Stylus=true
 Reversible=false
 Touch=true
 Ring=false
-Buttons=0

data/cintiq-pro-24-p.tablet

@@ -42,4 +42,3 @@ Stylus=true
 Reversible=false
 Touch=false
 Ring=false
-Buttons=0

data/cintiq-pro-24-pt.tablet

@@ -43,4 +43,3 @@ Stylus=true
 Reversible=false
 Touch=true
 Ring=false
-Buttons=0

data/cintiq-pro-27.tablet

@@ -41,7 +41,6 @@ Stylus=true
 Reversible=false
 Touch=true
 Ring=false
-Buttons=8
 
 [Buttons]
 Left=A;B;C;D

data/cintiq-pro-32.tablet

@@ -43,4 +43,3 @@ Stylus=true
 Reversible=false
 Touch=true
 Ring=false
-Buttons=0

data/dell-canvas-27.tablet

@@ -35,4 +35,3 @@ Stylus=true
 Reversible=false
 Touch=true
 Ring=false
-Buttons=0

data/dtf-720.tablet

@@ -14,5 +14,4 @@ IntegratedIn=Display
 
 [Features]
 Stylus=true
-Buttons=0
 

data/dth-1152.tablet

@@ -21,4 +21,3 @@ Touch=true
 Ring=false
 Ring2=false
 NumStrips=0
-Buttons=0

data/dth-2242.tablet

@@ -35,7 +35,6 @@ Ring=false
 Ring2=false
 NumStrips=0
 # Actually 7 buttons but one is reserved for onscreen menus
-Buttons=6
 
 [Buttons]
 Top=A;B;C;D;E;F

data/dth-2452.tablet

@@ -32,7 +32,6 @@ Ring=false
 Ring2=false
 NumStrips=0
 # Actually 5 buttons but one is reserved for onscreen menus
-Buttons=4
 
 [Buttons]
 Right=A;B;C;D

data/dti-520.tablet

@@ -35,7 +35,6 @@ Ring=false
 Ring2=false
 NumStrips=0
 # Actually 11 buttons but the two Ctrl ones send the same scancode
-Buttons=10
 
 [Buttons]
 Top=F;G;H;I;J

data/dtk-1651.tablet

@@ -29,7 +29,6 @@ Touch=false
 Ring=false
 Ring2=false
 NumStrips=0
-Buttons=4
 
 [Buttons]
 Right=A;B;C;D