[llvm][lit] Remove unused default feature (llvm#94804)

Author: keith

llvm/utils/lit/lit/llvm/config.py

@@ -90,9 +90,6 @@ def __init__(self, lit_config, config):
 
         # Running on Darwin OS
         if platform.system() == "Darwin":
-            # FIXME: lld uses the first, other projects use the second.
-            # We should standardize on the former.
-            features.add("system-linker-mach-o")
             features.add("system-darwin")
         elif platform.system() == "Windows":
             # For tests that require Windows to run.