gcc: Drop gcc-cross4.inc, its pointless now

The include was useful historically, its not anymore so lets remove it.
This should have no functional change except on any layers directly depending
on it or gcc-cross.inc but even then it would only impact sh4 and is easily
fixed if there was a problem.

(From OE-Core rev: e7e8fe11c34bf05179f3bbaa2fb1af7b7125696a)

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

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

@@ -106,3 +106,5 @@ STOP
 	chmod +x ${B}/${TARGET_PREFIX}testgcc
 
 }
+
+EXTRA_OECONF_append_sh4 = " --with-multilib-list= --enable-incomplete-targets "

meta/recipes-devtools/gcc/gcc-cross4.inc

@@ -1,3 +0,0 @@
-require gcc-cross.inc
-
-EXTRA_OECONF_append_sh4 = " --with-multilib-list= --enable-incomplete-targets "

meta/recipes-devtools/gcc/gcc-cross_4.7.bb

@@ -1,5 +1,5 @@
 require recipes-devtools/gcc/gcc-${PV}.inc
-require gcc-cross4.inc
+require gcc-cross.inc
 
 EXTRA_OECONF += "--disable-libunwind-exceptions \
                  --with-mpfr=${STAGING_DIR_NATIVE}${prefix_native} \

meta/recipes-devtools/gcc/gcc-cross_4.8.bb

@@ -1,5 +1,5 @@
 require recipes-devtools/gcc/gcc-${PV}.inc
-require gcc-cross4.inc
+require gcc-cross.inc
 
 EXTRA_OECONF += "--disable-libunwind-exceptions \
                  --with-mpfr=${STAGING_DIR_NATIVE}${prefix_native} \