Remove the dead skill and power DB loaders

Deletes the uncalled static_rune_skill_adjusts, static_rune_maxskills,
static_skill_skillsgranted, static_skill_skillreq and static_power_powergrant
loaders and their ResultSet constructors. LOAD_RUNE_POWERS stays for the 14
Magister Captain guard contract ids. No value changes.

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

src/engine/powers/RuneSkillAdjustEntry.java

@@ -12,8 +12,6 @@ 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;
 import java.util.Map;
@@ -27,14 +25,6 @@ public class RuneSkillAdjustEntry {
     public int level;
 
 
-    public RuneSkillAdjustEntry(ResultSet rs) throws SQLException {
-        this.name = rs.getString("name");
-        this.token = rs.getInt("token");
-        this.skill_type = rs.getString("skill_type");
-        this.rank = rs.getInt("rank");
-        this.level = rs.getInt("level");
-    }
-
     public RuneSkillAdjustEntry(RuneTemplate rune, String skillType, int[] adjust) {
         this.name = rune.obj_name;
         this.token = Hasher.SBStringHash(skillType);