integration: remove old config

Summary: this config was deleted from EdenConfig.h a while ago. It's safe to remove

Reviewed By: lXXXw

Differential Revision: D66833825

fbshipit-source-id: 9a5ff18d793a889bf9e9b348de66c85ba71ce285

eden/integration/lib/testcase.py

@@ -261,7 +261,6 @@ def edenfs_extra_config(self) -> Optional[Dict[str, List[str]]]:
         """
         configs = {
             "experimental": ["enable-nfs-server = true\nwindows-symlinks = false"],
-            "thrift": ["request-tree-metadata = true"],
             # Defaulting to 8 retry threads is excessive when the test
             # framework runs tests on each CPU core.
             "hg": ['num-retry-threads = "2"'],