[cppia] enable the test 4986 (closes #9261)

tests/unit/src/unit/issues/Issue4986.hx

@@ -4,11 +4,7 @@ class Issue4986 extends Test {
 	function test() {
 		try {
 			var v = new haxe.ds.Vector<Array<Float>>(1);
-			#if cppia //see https://github.com/HaxeFoundation/haxe/issues/9261
-			v[0].length;
-			#else
 			foo(v[0].length);
-			#end
 		} catch (e:Dynamic) {}
 		noAssert();
 	}