Slightly more fleshed out sector selection

core/src/io/anuke/mindustry/maps/Sectors.java

@@ -228,11 +228,6 @@ public class Sectors{
             sector.missions.add(new BattleMission());
         }
 
-        //possibly another battle mission
-        if(Mathf.randomSeed(sector.getSeed() + 3) < 0.3){
-            sector.missions.add(new BattleMission());
-        }
-
         //possibly add another recipe mission
         addRecipeMission(sector, 11);
     }

core/src/io/anuke/mindustry/maps/missions/BattleMission.java

@@ -25,7 +25,7 @@ public class BattleMission extends Mission{
 
     @Override
     public void generate(Generation gen){
-        super.generate(gen);
+        generateCoreAt(gen, 50, 50, defaultTeam);
 
         if(state.teams.get(defaultTeam).cores.size == 0){
             return;

core/src/io/anuke/mindustry/maps/missions/Mission.java

@@ -95,9 +95,7 @@ public abstract class Mission{
         return Array.with();
     }
 
-    public void generate(Generation gen){
-        generateCoreAt(gen, 50, 50, defaultTeam);
-    }
+    public void generate(Generation gen){}
 
     public void generateCoreAt(Generation gen, int coreX, int coreY, Team team){
         gen.tiles[coreX][coreY].setBlock(StorageBlocks.core);