Remove via inspector added objects within array

What I have is a script attached to an empty object. This script has multiple variables and arrays. One of those arrays is an array with game objects. What I would like to do is, at the start, remove some of the objects (I can set a variable to 12 for example, and the object array is 16, so I want to remove the last 4). I tried both Destroy and DestroyImmediate, but these don't seem to be the right approach. This is what I have, and what's not working. Also, I want the current order of the array to remain, but afterwards I want to shuffle. It seems that somehow it shuffles my complete array, because of the wrong deleting process?

 if(numberOfTiles > tileObjectsInGame.length){
     numberOfTiles = tileObjectsInGame.length;
 }
 else {
     for (i = numberOfTiles; i < tileObjectsInGame.length; i++) {
         Destroy(tileObjectsInGame[i].gameObject);
     }
 }
 
 RandomizeBuiltinArray(tileObjectsInGame);
 
 static function RandomizeBuiltinArray(arr : Object[]){
 for (var i = arr.Length - 1; i > 0; i--) {
     var r = Random.Range(0,i);
     var tmp = arr[i];
     arr[i] = arr[r];
     arr[r] = tmp;
 }