Remove Map ID filter (previously it was just 0) (#3)

ID is unused and unwanted for MapFilter.

Reviewed-on: #3
Reviewed-by: itzaname <itzaname@noreply@itzana.me>
Co-authored-by: Quaternions <krakow20@gmail.com>
Co-committed-by: Quaternions <krakow20@gmail.com>

maps.proto

@@ -38,7 +38,6 @@ message MapRequest {
 }
 
 message MapFilter {
-  int64 ID = 1;
   optional string DisplayName = 2;
   optional string Creator = 3;
   optional int32 GameID = 4;