remove distance reduction for mine production

src/engine/objects/Mine.java

@@ -570,22 +570,6 @@ public class Mine extends AbstractGameObject {
         }
         //add base production on top;
         totalModded += baseProduction;
-        //skip distance check for expansion.
-        if (this.isExpansion())
-            return (int) totalModded;
-
-        if (this.owningGuild.isEmptyGuild() == false) {
-            if (this.owningGuild.getOwnedCity() != null) {
-                float distanceSquared = this.owningGuild.getOwnedCity().getLoc().distanceSquared2D(mineBuilding.getLoc());
-
-                if (distanceSquared > sqr(10000 * 3))
-                    totalModded *= .25f;
-                else if (distanceSquared > sqr(10000 * 2))
-                    totalModded *= .50f;
-                else if (distanceSquared > sqr(10000))
-                    totalModded *= .75f;
-            }
-        }
         return (int) totalModded;
     }