Really remove the old change this time.

Author: cmtice

lldb/test/lit.cfg.py

@@ -13,15 +13,3 @@
 config.name = "lldb"
 config.test_source_root = os.path.dirname(__file__)
 config.test_exec_root = os.path.join(config.lldb_obj_root, "test")
-
-# We prefer the lit internal shell which provides a better user experience on
-# failures and is faster unless the user explicitly disables it with
-# LIT_USE_INTERNAL_SHELL=0 env var.
-
-use_lit_shell = True
-lit_shell_env = os.environ.get("LIT_USE_INTERNAL_SHELL")
-if lit_shell_env:
-    use_lit_shell = lit.util.pythonize_bool(lit_shell_env)
-
-if use_lit_shell:
-    os.environ["LIT_USE_INTERNAL_SHELL"] = "1"