Revert "Weston is added to the build dependencies, and is now run by …

…xvfb.py."

This reverts commit 1497249.

build/install-build-deps.sh

@@ -185,7 +185,6 @@ dev_list="\
   ruby
   subversion
   uuid-dev
-  weston
   wdiff
   x11-utils
   xcompmgr

testing/xvfb.py

@@ -75,19 +75,13 @@ def run_executable(cmd, env, stdoutfile=None):
         xcompmgr_proc = subprocess.Popen('xcompmgr', stdout=subprocess.PIPE,
                                          stderr=subprocess.STDOUT, env=env)
 
-        # Tests may need a Wayland server.
-        weston_proc = subprocess.Popen(('weston', '--backend=x11-backend.so'),
-                                       stdout=subprocess.PIPE,
-                                       stderr=subprocess.STDOUT, env=env)
-
         return test_env.run_executable(cmd, env, stdoutfile)
       except OSError as e:
         print >> sys.stderr, 'Failed to start Xvfb or Openbox: %s' % str(e)
         return 1
       finally:
         kill(openbox_proc)
         kill(xcompmgr_proc)
-        kill(weston_proc)
     else:
       env['_CHROMIUM_INSIDE_XVFB'] = '1'
       if stdoutfile: