[Server] Remove `checkMovement`

[MotoLegacy]

The checkMovement function takes a significantly long time to execute, proven by FTE's SSQC profiler.

quakec/source/server/player.qc

Lines 126 to 160 in 92f38d9

	float(float dir) checkMovement =
	{
	makevectors(self.movement);
	string a = vtos(self.movement);
	float x, y;
	tokenize(a);
	x = stof(argv(0));
	y = stof(argv(1));
	switch(dir) {
	case forward:
	if (x > 0)
	return 1;
	break;
	case backward:
	if (x < 0)
	return 1;
	break;
	case right:
	if (y > 0)
	return 1;
	break;
	case left:
	if (y < 0)
	return 1;
	break;
	case all_move:
	if (x || y)
	return 1;
	break;
	default:
	return 0;
	}
	}