Remove not needed argument

Author: JeroenDeDauw

tests/unit/Statement/StatementTest.php

@@ -290,15 +290,15 @@ public function testGivenStatementWithDifferentGuids_equalsReturnsFalse() {
 	public function testStatementClaimWithDifferentReferences_equalsReturnsFalse() {
 		$statement = new Statement(
 			new PropertyNoValueSnak( 42 ),
-			new SnakList( array() ),
+			new SnakList(),
 			new ReferenceList( array(
 				new Reference( array( new PropertyNoValueSnak( 1337 ) ) ),
 			) )
 		);
 
 		$differentStatement = new Statement(
 			new PropertyNoValueSnak( 42 ),
-			new SnakList( array() ),
+			new SnakList(),
 			new ReferenceList( array(
 				new Reference( array( new PropertyNoValueSnak( 32202 ) ) ),
 			) )