Remove no longer used android_build_type var.

All uses of android_build_type have been updated to refer to the more
meaningful android_webview_build; remove the temporary compatibility
variable.

BUG=184431

Review URL: https://codereview.chromium.org/14404003

git-svn-id: http://src.chromium.org/svn/trunk/src/build@195522 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

common.gypi

@@ -1034,10 +1034,6 @@
     'android_app_version_name%': 'Developer Build',
     'android_app_version_code%': 0,
 
-    # Temporarily set android_build_type until all uses of it have been renamed.
-    # http://crbug.com/184431
-    'android_build_type%': '<(android_webview_build)',
-
     'sas_dll_exists': '<!(python <(DEPTH)/build/dir_exists.py <(sas_dll_path))',
     'wix_exists': '<!(python <(DEPTH)/build/dir_exists.py <(wix_path))',