Remove Pyre mode headers in fbcode/fair_infra

Summary:
Remove standalone `# pyre-strict` and `# pyre-unsafe` mode headers from Python files under `fbcode/fair_infra`.

Pyrefly type-checks all files in one consistent mode, so these legacy per-file mode headers no longer have an effect. Other Pyre directives and generated files are left unchanged.Pyrefly is now the default type checker across FBCode so this diff introduces no functional changes.
#pyreupgrade

Differential Revision: D117255124

fbshipit-source-id: 00f7d45c89c88d9da0a25028ea05fda06b157404

Author: generatedunixname89002005307016

iopath/__init__.py

@@ -1,6 +1,5 @@
 # Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
 
-# pyre-strict
 
 from iopath.common import file_lock, get_cache_dir, LazyPath, PathManager
 

iopath/common/__init__.py

@@ -1,6 +1,5 @@
 # Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
 
-# pyre-strict
 
 from iopath.common.file_io import file_lock, get_cache_dir, LazyPath, PathManager
 

iopath/common/azure_blob.py

@@ -3,8 +3,6 @@
 # This source code is licensed under the MIT license found in the
 # LICENSE file in the root directory of this source tree.
 
-# pyre-strict
-
 
 import base64
 import io

iopath/common/download.py

@@ -1,6 +1,5 @@
 # Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
 
-# pyre-strict
 
 import logging
 import os

iopath/common/event_logger.py

@@ -1,6 +1,5 @@
 # Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
 
-# pyre-strict
 
 from typing import Dict, Optional, TypeVar
 

iopath/common/file_io.py

@@ -1,6 +1,5 @@
 # Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
 
-# pyre-strict
 
 import base64
 import concurrent.futures

iopath/common/non_blocking_io.py

@@ -1,6 +1,5 @@
 # Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
 
-# pyre-strict
 
 import concurrent.futures
 import io

iopath/common/s3.py

@@ -1,6 +1,5 @@
 # Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
 
-# pyre-strict
 
 import datetime as dt
 import io

iopath/tabular/__init__.py

@@ -1,3 +1 @@
 # Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
-
-# pyre-strict

iopath/tabular/tabular_io.py

@@ -1,6 +1,5 @@
 # Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
 
-# pyre-strict
 
 from typing import Any