diff --git a/browser/confvars.sh b/browser/confvars.sh
index 6fa324be930..9111f677f0a 100755
--- a/browser/confvars.sh
+++ b/browser/confvars.sh
@@ -5,26 +5,6 @@
 
 MOZ_APP_VENDOR=Mozilla
 
-if test "$OS_ARCH" = "WINNT"; then
-  if ! test "$HAVE_64BIT_BUILD"; then
-    if test "$MOZ_UPDATE_CHANNEL" = "nightly" -o \
-            "$MOZ_UPDATE_CHANNEL" = "nightly-try" -o \
-            "$MOZ_UPDATE_CHANNEL" = "aurora" -o \
-            "$MOZ_UPDATE_CHANNEL" = "beta" -o \
-            "$MOZ_UPDATE_CHANNEL" = "release"; then
-      if ! test "$MOZ_DEBUG"; then
-        if ! test "$USE_STUB_INSTALLER"; then
-          # Expect USE_STUB_INSTALLER from taskcluster for downstream task consistency
-          echo "ERROR: STUB installer expected to be enabled but"
-          echo "ERROR: USE_STUB_INSTALLER is not specified in the environment"
-          exit 1
-        fi
-        MOZ_STUB_INSTALLER=1
-      fi
-    fi
-  fi
-fi
-
 BROWSER_CHROME_URL=chrome://browser/content/browser.xhtml
 
 # MOZ_APP_DISPLAYNAME will be set by branding/configure.sh