diff --git a/backends/arm/ethosu/__init__.py b/backends/arm/ethosu/__init__.py
index 25a91dc5929..10b14d4a68a 100644
--- a/backends/arm/ethosu/__init__.py
+++ b/backends/arm/ethosu/__init__.py
@@ -3,7 +3,6 @@
 # This source code is licensed under the BSD-style license found in the
 # LICENSE file in the root directory of this source tree.
 #
-# pyre-unsafe
 
 from .backend import EthosUBackend  # noqa: F401
 from .compile_spec import EthosUCompileSpec  # noqa: F401
diff --git a/backends/arm/ethosu/backend.py b/backends/arm/ethosu/backend.py
index a529aa126f4..c2feab6478b 100644
--- a/backends/arm/ethosu/backend.py
+++ b/backends/arm/ethosu/backend.py
@@ -3,7 +3,6 @@
 # This source code is licensed under the BSD-style license found in the
 # LICENSE file in the root directory of this source tree.
 
-# pyre-unsafe
 
 #
 # Main implementation of AoT flow to partition and preprocess for Arm target
diff --git a/backends/arm/ethosu/partitioner.py b/backends/arm/ethosu/partitioner.py
index 4e6c5f4b985..33ac6a1db62 100644
--- a/backends/arm/ethosu/partitioner.py
+++ b/backends/arm/ethosu/partitioner.py
@@ -3,7 +3,6 @@
 # This source code is licensed under the BSD-style license found in the
 # LICENSE file in the root directory of this source tree.
 
-# pyre-unsafe
 
 from typing import final, Optional, Sequence
 
diff --git a/backends/arm/tosa/__init__.py b/backends/arm/tosa/__init__.py
index 132d3563a43..30860642ac5 100644
--- a/backends/arm/tosa/__init__.py
+++ b/backends/arm/tosa/__init__.py
@@ -3,7 +3,6 @@
 # This source code is licensed under the BSD-style license found in the
 # LICENSE file in the root directory of this source tree.
 #
-# pyre-unsafe
 
 from .specification import TosaSpecification
 
diff --git a/backends/arm/tosa/backend.py b/backends/arm/tosa/backend.py
index e19d026e03b..8fb50707952 100644
--- a/backends/arm/tosa/backend.py
+++ b/backends/arm/tosa/backend.py
@@ -3,7 +3,6 @@
 # This source code is licensed under the BSD-style license found in the
 # LICENSE file in the root directory of this source tree.
 
-# pyre-unsafe
 
 #
 # Main implementation of AoT flow to partition and preprocess for Arm target
diff --git a/backends/arm/tosa/mapping.py b/backends/arm/tosa/mapping.py
index e21fd38723b..2287a727009 100644
--- a/backends/arm/tosa/mapping.py
+++ b/backends/arm/tosa/mapping.py
@@ -3,7 +3,6 @@
 # This source code is licensed under the BSD-style license found in the
 # LICENSE file in the root directory of this source tree.
 
-# pyre-unsafe
 """Provide PyTorch-to-TOSA mapping helpers.
 
 Use these utilities to translate PyTorch dtypes and FX node metadata into
diff --git a/backends/arm/tosa/partitioner.py b/backends/arm/tosa/partitioner.py
index 6eb1dcbef72..dbe18f7db7d 100644
--- a/backends/arm/tosa/partitioner.py
+++ b/backends/arm/tosa/partitioner.py
@@ -3,7 +3,6 @@
 # This source code is licensed under the BSD-style license found in the
 # LICENSE file in the root directory of this source tree.
 
-# pyre-unsafe
 """Provide a partitioner for delegating subgraphs to the TOSA backend.
 
 Implement logic to identify and tag regions of an ``ExportedProgram`` that can
diff --git a/backends/arm/tosa/quant_utils.py b/backends/arm/tosa/quant_utils.py
index ddf9d31145c..9ad2192bb9a 100644
--- a/backends/arm/tosa/quant_utils.py
+++ b/backends/arm/tosa/quant_utils.py
@@ -3,7 +3,6 @@
 # This source code is licensed under the BSD-style license found in the
 # LICENSE file in the root directory of this source tree.
 
-# pyre-unsafe
 
 # Utility functions for TOSA quantized lowerings
 
diff --git a/backends/arm/tosa/specification.py b/backends/arm/tosa/specification.py
index 3edf27760b5..7afa7d9f0de 100644
--- a/backends/arm/tosa/specification.py
+++ b/backends/arm/tosa/specification.py
@@ -3,7 +3,6 @@
 # This source code is licensed under the BSD-style license found in the
 # LICENSE file in the root directory of this source tree.
 
-# pyre-unsafe
 """Provide TOSA specification parsing and context utilities.
 
 Use these helpers to parse and validate TOSA profile/extension strings and to
diff --git a/backends/arm/tosa/utils.py b/backends/arm/tosa/utils.py
index edcef8ceb9d..14a22298d8a 100644
--- a/backends/arm/tosa/utils.py
+++ b/backends/arm/tosa/utils.py
@@ -3,7 +3,6 @@
 # This source code is licensed under the BSD-style license found in the
 # LICENSE file in the root directory of this source tree.
 
-# pyre-unsafe
 
 import logging
 from typing import Any
diff --git a/backends/arm/vgf/__init__.py b/backends/arm/vgf/__init__.py
index f4ce8f5d1a4..88be90e084e 100644
--- a/backends/arm/vgf/__init__.py
+++ b/backends/arm/vgf/__init__.py
@@ -3,7 +3,6 @@
 # This source code is licensed under the BSD-style license found in the
 # LICENSE file in the root directory of this source tree.
 #
-# pyre-unsafe
 
 from .backend import VgfBackend  # noqa: F401
 from .compile_spec import VgfCompileSpec  # noqa: F401
diff --git a/backends/arm/vgf/backend.py b/backends/arm/vgf/backend.py
index 7ed0154ab99..82d200f44fd 100644
--- a/backends/arm/vgf/backend.py
+++ b/backends/arm/vgf/backend.py
@@ -3,7 +3,6 @@
 # This source code is licensed under the BSD-style license found in the
 # LICENSE file in the root directory of this source tree.
 
-# pyre-unsafe
 
 #
 # Main implementation of AoT flow to partition and preprocess for VGF target
diff --git a/backends/arm/vgf/partitioner.py b/backends/arm/vgf/partitioner.py
index ea10730e810..be684505d2b 100644
--- a/backends/arm/vgf/partitioner.py
+++ b/backends/arm/vgf/partitioner.py
@@ -3,7 +3,6 @@
 # This source code is licensed under the BSD-style license found in the
 # LICENSE file in the root directory of this source tree.
 
-# pyre-unsafe
 
 from typing import final, Optional, Sequence