Remove obsolete comments and enable FunctionComment.WrongStyle sniff

I believe these comments are all obsolete by now. I tried to
understand what each comment means, and what value it brings when we
keep it around. I think there is not much and suggest to just remove
them.

Change-Id: Ifdd27f126892edd91e10d169ff8464acf03cd856

Author: thiemowmde

tests/unit/Entity/ItemTest.php

@@ -391,8 +391,6 @@ public function testOriginalDoesNotChangeWithClone( Item $original, Item $clone
 		$this->assertFalse( $original->getSiteLinkList()->isEmpty() );
 	}
 
-	// Below are tests copied from EntityTest
-
 	public static function labelProvider() {
 		return [
 			[ 'en', 'spam' ],

tests/unit/Entity/PropertyTest.php

@@ -265,8 +265,6 @@ public function testOriginalDoesNotChangeWithClone( Property $original, Property
 		$this->assertTrue( $originalStatement->getReferences()->isEmpty() );
 	}
 
-	// Below are tests copied from EntityTest
-
 	public static function labelProvider() {
 		return [
 			[ 'en', 'spam' ],