Remove pylint directives (replaced by ruff per #1323)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: sbryngelson

toolchain/mfc/test/cases.py

@@ -1,4 +1,3 @@
-# pylint: disable=too-many-lines
 import itertools
 import os
 import typing
@@ -86,9 +85,6 @@ def get_dimensions():
     return r
 
 
-# pylint: disable=too-many-locals, too-many-statements
-
-
 def list_cases() -> typing.List[TestCaseBuilder]:
     stack, cases = CaseGeneratorStack(), []