How would I reorganize an array?

Lets say I have an array of an unknown data type that I chose to remove by simply overwriting that index number by its following members

So for example, I found an item for removal in BTable[h][0] and there are

3 things in the array. I need to move BTable[h][1] into BTable[h][0] and BTable[h][2] into BTable[h][1]

Thanks