Bug 937258 - Part b: Remove gfx/tests/gtest/Makefile.in; r=gps

CXXFLAGS is only taken into account when set *after* the rules.mk inclusion,
so it is useless here.

gfx/tests/gtest/Makefile.in

@@ -1,10 +0,0 @@
-#
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-VPATH          = @srcdir@ $(srcdir)/$(DEPTH)/gfx/2d/unittest
-CXXFLAGS += $(MOZ_CAIRO_CFLAGS) $(MOZ_PIXMAN_CFLAGS) $(TK_CFLAGS) 
-
-# Create a GTest library
-include $(topsrcdir)/config/rules.mk