Merge pull request #29998 from akien-mga/x11-builtin-libpng

SCons: Default to builtin libpng/freetype on Linux

platform/x11/detect.py

@@ -75,11 +75,7 @@ def get_opts():
 
 def get_flags():
 
-    return [
-        ('builtin_freetype', False),
-        ('builtin_libpng', False),
-        ('builtin_zlib', False),
-    ]
+    return []
 
 
 def configure(env):