(master) imports cleanup

src/network/mcpe/NetworkSession.php

@@ -103,7 +103,6 @@ use pocketmine\utils\Utils;
 use pocketmine\world\Position;
 use function array_map;
 use function array_values;
-use function assert;
 use function base64_encode;
 use function bin2hex;
 use function count;

src/network/mcpe/handler/InGamePacketHandler.php

@@ -95,6 +95,7 @@ use function implode;
 use function json_decode;
 use function json_encode;
 use function json_last_error_msg;
+use function max;
 use function microtime;
 use function preg_match;
 use function strlen;