fixup! Replace error-prone instanceof in Rules classes

Author: zonuexe

src/Rules/PhpDoc/RequireExtendsCheck.php

@@ -8,7 +8,6 @@
 use PHPStan\Rules\ClassNameNodePair;
 use PHPStan\Rules\IdentifierRuleError;
 use PHPStan\Rules\RuleErrorBuilder;
-use PHPStan\Type\ObjectType;
 use PHPStan\Type\VerbosityLevel;
 use function array_merge;
 use function count;

src/Rules/UnusedFunctionParametersCheck.php

@@ -10,7 +10,6 @@
 use function array_combine;
 use function array_map;
 use function array_merge;
-use function count;
 use function is_array;
 use function is_string;
 use function sprintf;