Remove the static_rune_powers loader

Nothing reads the table since the captain powers moved to MinionType.
Drops LOAD_RUNE_POWERS and the ResultSet RunePowerEntry constructor.
The table drop is MBDATA sql/3.9-rune-powers-drop.sql, run after deploy.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/engine/powers/RunePowerEntry.java

@@ -13,8 +13,6 @@ import engine.parsers.objects.RuneTemplate;
 import engine.util.Hasher;
 import org.pmw.tinylog.Logger;
 
-import java.sql.ResultSet;
-import java.sql.SQLException;
 import java.util.ArrayList;
 import java.util.HashMap;
 
@@ -26,13 +24,6 @@ public class RunePowerEntry {
     public int rank;
 
 
-    public RunePowerEntry(ResultSet rs) throws SQLException {
-        this.name = rs.getString("name");
-        this.token = rs.getInt("token");
-        this.power_type = rs.getString("power_type");
-        this.rank = rs.getInt("rank");
-    }
-
     public RunePowerEntry(RuneTemplate rune, PowerGrant powerGrant) {
         this.name = rune.obj_name;
         this.token = Hasher.SBStringHash(powerGrant.power_type);