x86-64/glibc: do not apply multilib and pure64 patches anymore

architecture/x86-64/pkg_glibc_post.conf

@@ -44,11 +44,7 @@ EOT
 	fi
 }
 
-if [ "$SDECFG_MULTILIB" != 1 ]; then
-	var_append patchfiles ' ' "$confdir/*pure64*.diff"
-else
-	var_append patchfiles ' ' "$confdir/*multilib*.diff"
-
+if [ "$SDECFG_MULTILIB" = 1 ]; then
 	if ! atstage toolchain; then
 		buildloops=2
 	fi