gcc: drop gcc 4.5 specific code

We have removed gcc 4.5 support since a long time, so this commit
removes dead code that was only used when building a toolchain based
on gcc 4.5.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/gcc/gcc.mk

@@ -97,15 +97,6 @@ HOST_GCC_COMMON_CONF_ENV = \
 GCC_COMMON_TARGET_CFLAGS = $(TARGET_CFLAGS)
 GCC_COMMON_TARGET_CXXFLAGS = $(TARGET_CXXFLAGS)
 
-# http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43810
-# Workaround until it's fixed in 4.5.4 or later
-ifeq ($(ARCH),powerpc)
-ifeq ($(findstring x4.5.,x$(GCC_VERSION)),x4.5.)
-GCC_COMMON_TARGET_CFLAGS = $(filter-out -Os,$(GCC_COMMON_TARGET_CFLAGS))
-GCC_COMMON_TARGET_CXXFLAGS = $(filter-out -Os,$(GCC_COMMON_TARGET_CXXFLAGS))
-endif
-endif
-
 # Xtensa libgcc can't be built with -mauto-litpools
 # because of the trick used to generate .init/.fini sections.
 ifeq ($(BR2_xtensa),y)