realpath isn't installed by default on travis' vms AND it's not

necessary if we're looking up by inode

Signed-off-by: Jesse Vincent <jesse@keyboard.io>

bin/kaleidoscope-builder

@@ -28,7 +28,7 @@ build_version () {
 build_paths() {
     # We don't really want to use find
     # shellcheck disable=SC2012
-    SKETCH_IDENTIFIER="$(ls -id "$(realpath "$(find_sketch)/${SKETCH}.ino")" | cut -d ' ' -f 1)-${SKETCH}.ino"
+    SKETCH_IDENTIFIER="$(ls -id "$(find_sketch)/${SKETCH}.ino" | cut -d ' ' -f 1)-${SKETCH}.ino"
     KALEIDOSCOPE_TEMP_PATH="${KALEIDOSCOPE_TEMP_PATH:-${TMPDIR:-/tmp}/kaleidoscope-${USER}}"