diff --git a/gunicorn/ctl/cli.py b/gunicorn/ctl/cli.py
index 6bd4f2e4..6e8f0783 100644
--- a/gunicorn/ctl/cli.py
+++ b/gunicorn/ctl/cli.py
@@ -230,7 +230,7 @@ def format_all(data: dict) -> str:
     return "\n".join(lines)
 
 
-def format_response(command: str, data: dict) -> str:
+def format_response(command: str, data: dict) -> str:  # pylint: disable=too-many-return-statements
     """
     Format response data based on command.
 
diff --git a/gunicorn/ctl/client.py b/gunicorn/ctl/client.py
index e75ec713..cc9d39fa 100644
--- a/gunicorn/ctl/client.py
+++ b/gunicorn/ctl/client.py
@@ -19,7 +19,6 @@ from gunicorn.ctl.protocol import (
 
 class ControlClientError(Exception):
     """Control client error."""
-    pass
 
 
 class ControlClient:
diff --git a/gunicorn/ctl/handlers.py b/gunicorn/ctl/handlers.py
index ffde7393..827f62ee 100644
--- a/gunicorn/ctl/handlers.py
+++ b/gunicorn/ctl/handlers.py
@@ -210,7 +210,6 @@ class CommandHandlers:
 
             # Try to get socket family
             try:
-                import socket
                 sock = lnr.sock
                 if sock.family == socket.AF_UNIX:
                     listener_info["type"] = "unix"
@@ -523,8 +522,6 @@ class CommandHandlers:
         Returns:
             List of dirty worker info dicts, or empty list on error
         """
-        import socket
-
         # Get socket path from arbiter object or environment
         dirty_socket_path = None
         if hasattr(self.arbiter, 'dirty_arbiter') and self.arbiter.dirty_arbiter:
diff --git a/gunicorn/ctl/protocol.py b/gunicorn/ctl/protocol.py
index b00e4910..36d2fe78 100644
--- a/gunicorn/ctl/protocol.py
+++ b/gunicorn/ctl/protocol.py
@@ -26,7 +26,6 @@ import struct
 
 class ProtocolError(Exception):
     """Protocol-level error."""
-    pass
 
 
 class ControlProtocol:
diff --git a/gunicorn/ctl/server.py b/gunicorn/ctl/server.py
index 59259f69..b585b438 100644
--- a/gunicorn/ctl/server.py
+++ b/gunicorn/ctl/server.py
@@ -204,7 +204,7 @@ class ControlSocketServer:
                 self.arbiter.log.exception("Command error")
             return make_error_response(request_id, f"Command failed: {e}")
 
-    def _execute_command(self, parts: list) -> dict:
+    def _execute_command(self, parts: list) -> dict:  # pylint: disable=too-many-return-statements
         """
         Execute a parsed command.
 
diff --git a/gunicorn/dirty/protocol.py b/gunicorn/dirty/protocol.py
index 3d216c54..5f3f9d04 100644
--- a/gunicorn/dirty/protocol.py
+++ b/gunicorn/dirty/protocol.py
@@ -573,7 +573,7 @@ class BinaryProtocol:
         sock.sendall(data)
 
     @staticmethod
-    def _encode_from_dict(message: dict) -> bytes:
+    def _encode_from_dict(message: dict) -> bytes:  # pylint: disable=too-many-return-statements
         """
         Encode a message dict to binary format.