Add rule to check @dataProvider

Author: villfa

Diff for: src/Rules/PHPUnit/DataProviderHelper.php

@@ -87,13 +87,6 @@ public function processDataProvider(
 			))->build();
 		}
 
-		if (!$dataProviderMethodReflection->isStatic()) {
-			$errors[] = RuleErrorBuilder::message(sprintf(
-				'@dataProvider %s related method must be static.',
-				$dataProviderName
-			))->build();
-		}
-
 		return $errors;
 	}
 

Diff for: tests/Rules/PHPUnit/DataProviderDeclarationRuleTest.php

@@ -27,10 +27,6 @@ public function testRule(): void
 				'@dataProvider providebaz related method is used with incorrect case: provideBaz.',
 				13,
 			],
-			[
-				'@dataProvider provideQux related method must be static.',
-				13,
-			],
 			[
 				'@dataProvider provideQuux related method must be public.',
 				13,