Merge pull request #7050 from wxtim/flake8-simplify-python-version-upper-pin

Turn off flake8-simplify for Python≥3.14

Author: ChrisPaulBennett

setup.cfg

@@ -104,7 +104,7 @@ tests =
     flake8-debugger>=4.0.0
     flake8-implicit-str-concat>=0.4
     flake8-mutable>=1.2.0
-    flake8-simplify>=0.14.0
+    flake8-simplify>=0.14.0; python_version<"3.14"
     flake8-type-checking
     flake8>=3.0.0
     mypy>=0.910