Remove unnecessary ellipsis expressions (#9976)

Ignore flake8 F821 warnings in stub files

stubs/pysftp/pysftp/__init__.pyi

@@ -25,10 +25,10 @@ from pysftp.helpers import (
 )
 
 class CnOpts:
-    log: bool = ...
-    compression: bool = ...
-    ciphers: Sequence[str] | None = ...
-    hostkeys: paramiko.HostKeys | None = ...
+    log: bool
+    compression: bool
+    ciphers: Sequence[str] | None
+    hostkeys: paramiko.HostKeys | None
     def __init__(self, knownhosts: str | None = None) -> None: ...
     def get_hostkey(self, host: str) -> paramiko.PKey: ...
 

stubs/pysftp/pysftp/exceptions.pyi

@@ -1,9 +1,9 @@
 class ConnectionException(Exception):
-    message: str = ...
+    message: str
     def __init__(self, host: str, port: int) -> None: ...
 
 class CredentialException(Exception):
-    message: str = ...
+    message: str
     def __init__(self, message: str) -> None: ...
 
 class HostKeysException(Exception): ...