reduce ui scons imports

selfdrive/ui/SConscript

@@ -1,9 +1,6 @@
 import os
 import json
-Import('env', 'arch', 'common', 'messaging', 'visionipc', 'transformations')
-
-raylib_env = env.Clone()
-
+Import('env', 'arch', 'common')
 
 # compile gettext .po -> .mo translations
 with open(File("translations/languages.json").abspath) as f:
@@ -14,13 +11,14 @@ po_sources = [src for src in po_sources if os.path.exists(File(src).abspath)]
 mo_targets = [src.replace(".po", ".mo") for src in po_sources]
 mo_build = []
 for src, tgt in zip(po_sources, mo_targets):
-  mo_build.append(raylib_env.Command(tgt, src, "msgfmt -o $TARGET $SOURCE"))
-mo_alias = raylib_env.Alias('mo', mo_build)
-raylib_env.AlwaysBuild(mo_alias)
+  mo_build.append(env.Command(tgt, src, "msgfmt -o $TARGET $SOURCE"))
+mo_alias = env.Alias('mo', mo_build)
+env.AlwaysBuild(mo_alias)
 
 if GetOption('extras'):
   # build installers
   if arch != "Darwin":
+    raylib_env = env.Clone()
     raylib_env['LIBPATH'] += [f'#third_party/raylib/{arch}/']
     raylib_env['LINKFLAGS'].append('-Wl,-strip-debug')