removed sh4 user build (not usable yet)

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1897 c046a42c-6fe2-441c-8c8c-71466251a162

configure

@@ -356,7 +356,7 @@ if test -z "$target_list" ; then
     fi
 # the following are Linux specific
     if [ "$user" = "yes" ] ; then
-        target_list="i386-user arm-user armeb-user sparc-user ppc-user mips-user mipsel-user sh4-user $target_list"
+        target_list="i386-user arm-user armeb-user sparc-user ppc-user mips-user mipsel-user $target_list"
     fi
 else
     target_list=`echo "$target_list" | sed -e 's/,/ /g'`