(svn r8875) -Fix

Remove unnecessary EnsureNoVehicle() checks because they are
- pointless per se (f.e. there are no vehicles on house tiles)
- done again (f.e. using CMD_LANDSCAPE_CLEAR just a few lines later)

src/station_cmd.cpp

@@ -1747,15 +1747,11 @@ int32 CmdBuildDock(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
 
 	if (!(flags & DC_NO_TOWN_RATING) && !CheckIfAuthorityAllows(tile)) return CMD_ERROR;
 
-	if (!EnsureNoVehicle(tile)) return CMD_ERROR;
-
 	cost = DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
 	if (CmdFailed(cost)) return CMD_ERROR;
 
 	TileIndex tile_cur = tile + TileOffsByDiagDir(direction);
 
-	if (!EnsureNoVehicle(tile_cur)) return CMD_ERROR;
-
 	if (!IsTileType(tile_cur, MP_WATER) || GetTileSlope(tile_cur, NULL) != SLOPE_FLAT) {
 		return_cmd_error(STR_304B_SITE_UNSUITABLE);
 	}