Remove OverwriteVariablesWithForeachRule from bug-14446 test config

The OverwriteVariablesWithForeachRule belongs to phpstan-strict-rules
and should be tested in that repo. The type inference test only needs
the polluteScopeWithAlwaysIterableForeach: false parameter.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: phpstan-bot

tests/PHPStan/Analyser/bug-14446.neon

@@ -1,8 +1,2 @@
 parameters:
 	polluteScopeWithAlwaysIterableForeach: false
-
-services:
-	-
-		class: PHPStan\Rules\ForeachLoop\OverwriteVariablesWithForeachRule
-		tags:
-			- phpstan.rules.rule