Do not display overdrive visual for router/conduit

core/src/mindustry/world/blocks/liquid/Conduit.java

@@ -40,6 +40,7 @@ public class Conduit extends LiquidBlock implements Autotiler{
         floating = true;
         conveyorPlacement = true;
         noUpdateDisabled = true;
+        canOverdrive = false;
     }
 
     @Override

core/src/mindustry/world/blocks/liquid/LiquidRouter.java

@@ -9,6 +9,7 @@ public class LiquidRouter extends LiquidBlock{
         super(name);
 
         noUpdateDisabled = true;
+        canOverdrive = false;
     }
 
     public class LiquidRouterBuild extends LiquidBuild{