general code cleanup

Signed-off-by: Leah Rowe <leah@libreboot.org>

script/vendor/download

@@ -146,8 +146,7 @@ mkdirs()
 		return 1
 	fi
 	mkdir -p "${1%/*}" || err "mkdirs: !mkdir -p ${1%/*}"
-	x_ rm -Rf "${appdir}"
-	x_ mkdir -p "${appdir}/"
+	remkdir "${appdir}"
 	if [ "${is_rom}" = "y" ]; then
 		cp "${_dl}" "${appdir}" || \
 		    err "mkdirs copyrom ${_dl}: can't copy to appdir"

script/vendor/inject

@@ -114,8 +114,7 @@ inject_vendorfiles()
 patch_release_roms()
 {
 	_tmpdir="tmp/romdir"
-	x_ rm -Rf "${_tmpdir}"
-	x_ mkdir -p "${_tmpdir}"
+	remkdir "${_tmpdir}"
 	tar -xf "${archive}" -C "${_tmpdir}" || \
 	    err "patch_release_roms: !tar -xf \"${archive}\" -C \"${_tmpdir}\""