Removes the key/value pair with the specified key from the current
public function removeKey( int $key, ): Vector<Tv>;
This will cause elements with higher keys to be assigned a new key that is
one less than their previous key. That is, values with keys
$k + 1 to
n - 1 will be given new keys
n - 2, where n is the length of
Vector before the call to
$k is negative, or
$k is greater than the largest key in the current
Vector, no changes are made.
Vector<Tv>- Returns itself.