Revert "Add non regression tests"

This reverts commit abbae6a.

Author: ondrejmirtes

tests/PHPStan/Rules/Comparison/ImpossibleCheckTypeFunctionCallRuleTest.php

@@ -1109,22 +1109,4 @@ public function testBug3979(): void
 		$this->analyse([__DIR__ . '/data/bug-3979.php'], []);
 	}
 
-	public function testBug8464(): void
-	{
-		if (PHP_VERSION_ID < 80000) {
-			$this->markTestSkipped('Test requires PHP 8.0.');
-		}
-
-		$this->checkAlwaysTrueCheckTypeFunctionCall = true;
-		$this->treatPhpDocTypesAsCertain = true;
-		$this->analyse([__DIR__ . '/data/bug-8464.php'], []);
-	}
-
-	public function testBug8954(): void
-	{
-		$this->checkAlwaysTrueCheckTypeFunctionCall = true;
-		$this->treatPhpDocTypesAsCertain = true;
-		$this->analyse([__DIR__ . '/data/bug-8954.php'], []);
-	}
-
 }