gcc-cross-initial: Remove unneeded temporary sysroot

We used to need to build gcc-cross-initial against a bare sysroot to avoid
contamination. With RSS, we no longer need to do this since the recipe sysroot
is already bare. We can therefore simply point at that and drop this code.

(From OE-Core rev: f70603887f823c14030bb738c4951d7aa3f022db)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/gcc/gcc-cross-initial.inc

@@ -24,7 +24,7 @@ EXTRA_OECONF = "\
     --enable-languages=c \
     --program-prefix=${TARGET_PREFIX} \
     --with-sysroot=/not/exist \
-    --with-build-sysroot=${GCCCROSS_BUILDSYSROOT} \
+    --with-build-sysroot=${STAGING_DIR_TARGET} \
     ${EXTRA_OECONF_INITIAL} \
     ${@bb.utils.contains('DISTRO_FEATURES', 'ld-is-gold', '--with-ld=${STAGING_BINDIR_TOOLCHAIN}/${TARGET_PREFIX}ld.bfd', '', d)} \
     ${EXTRA_OECONF_GCC_FLOAT} \
@@ -33,17 +33,6 @@ EXTRA_OECONF = "\
 
 EXTRA_OECONF += "--with-native-system-header-dir=${SYSTEMHEADERS}"
 
-GCCCROSS_BUILDSYSROOT = "${B}/tmpsysroot"
-
-do_configure_prepend () {
-	sysr=${GCCCROSS_BUILDSYSROOT}${target_includedir}
-	mkdir -p $sysr
-	for t in linux asm asm-generic; do
-		rm -f $sysr/$t
-		ln -s ${STAGING_DIR_TARGET}${target_includedir}/$t $sysr/
-	done
-}
-
 do_compile () {
     oe_runmake all-gcc configure-target-libgcc
 }