[Autotools] Remove definitions of unnecessary Automake conditionals
https://bugs.webkit.org/show_bug.cgi?id=111830

Reviewed by Philippe Normand.

The following Automake conditionals are not used anywhere and should have their
definitions in SetupAutomake.m4 removed:
ENABLE_GAMEPAD, ENABLE_XSLT, ENABLE_GEOLOCATION, ENABLE_SVG_FONTS,
ENABLE_OPCODE_STATS, ENABLE_CSS_FILTERS, ENABLE_CSS_SHADERS.

* Source/autotools/SetupAutomake.m4:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@145201 268f45cc-cd09-0410-ab3c-d52691b4dbfc