diff --git a/libretro-build-common.sh b/libretro-build-common.sh
index d6b79688..ac0299cb 100755
--- a/libretro-build-common.sh
+++ b/libretro-build-common.sh
@@ -386,63 +386,3 @@ create_dist_dir() {
 }
 
 create_dist_dir
-
-
-########## LEGACY RULES
-# TODO: Port these to modern rules
-
-build_libretro_mame_prerule() {
-	build_dir="$WORKDIR/libretro-mame"
-
-	if build_should_skip mame "$build_dir"; then
-		echo "Core mame is already built, skipping..."
-		return
-	fi
-
-	ret=0
-	if [ -d "$build_dir" ]; then
-		echo ''
-		echo "=== Building MAME ==="
-		echo_cmd "cd \"$build_dir\""
-
-		local extra_args
-		[ "${MAME_GIT_TINY:=0}" -eq 1 ] && extra_args="$extra_args SUBTARGET=tiny"
-
-		if [ -z "$NOCLEAN" ]; then
-			echo_cmd "$MAKE -f Makefile.libretro $extra_args platform=\"$FORMAT_COMPILER_TARGET\" \"-j$JOBS\" clean"
-			ret=$?
-
-			if [ "$ret" != 0 ]; then
-				die 'Failed to clean MAME'
-				return $ret
-			fi
-		fi
-
-		# For mame platforms that are CROSS_BUILD's (iOS/Android), we must make buildtools natively
-		if [ "$platform" = "ios" ]; then
-			echo_cmd "$MAKE -f Makefile.libretro platform=\"\" buildtools" || die 'Failed to build MAME buildtools'
-		fi
-
-		# This hack is because mame uses $(CC) to comiple C++ code because "historical reasons"
-		# It can/should be removed when upstream MAME fixes it on their end.
-		MAME_COMPILER="REALCC=\"${CC:-cc}\" CC=\"${CXX:-c++}\""
-
-		# mame's tiny subtarget doesn't support UME
-		mame_targets="mame mess ume"
-		[ "$MAME_GIT_TINY" -eq 1 ] && mame_targets="mame mess"
-
-		for target in $mame_targets; do
-			echo_cmd "$MAKE -f Makefile.libretro $extra_args \"TARGET=$target\" platform=\"$FORMAT_COMPILER_TARGET\" $MAME_COMPILER \"-j$JOBS\"" || die "Failed to build $target"
-			copy_core_to_dist "$target"
-			ret=$?
-
-			# If a target fails, stop here...
-			[ $ret -eq 0 ] || break
-		done
-
-	else
-		echo 'MAME not fetched, skipping ...'
-	fi
-
-	build_save_revision $ret mame
-}