Exclude player caller from packet's fields (#7368)

annotations/src/main/java/mindustry/annotations/remote/CallGenerator.java

@@ -60,7 +60,13 @@ public class CallGenerator{
             register.addStatement("mindustry.net.Net.registerPacket($L.$L::new)", packageName, ent.packetClassName);
 
             //add fields to the type
-            for(Svar param : ent.element.params()){
+            Seq<Svar> params = ent.element.params();
+            for(int i = 0; i < params.size; i++){
+                if(!ent.where.isServer && i == 0){
+                    continue;
+                }
+
+                Svar param = params.get(i);
                 packet.addField(param.tname(), param.name(), Modifier.PUBLIC);
             }