Switch from gradle to maven (preference) and optimize code

src/main/java/com/btk5h/skriptdb/skript/ExprDBError.java

@@ -1,50 +0,0 @@
-package com.btk5h.skriptdb.skript;
-
-import org.bukkit.event.Event;
-
-import ch.njol.skript.Skript;
-import ch.njol.skript.lang.Expression;
-import ch.njol.skript.lang.ExpressionType;
-import ch.njol.skript.lang.SkriptParser;
-import ch.njol.skript.lang.util.SimpleExpression;
-import ch.njol.util.Kleenean;
-
-/**
- * Stores the error from the last executed statement, if there was one.
- *
- * @name Last Data Source Error
- * @pattern [the] [last] (sql|db|data(base|[ ]source)) error
- * @return text
- * @since 0.1.0
- */
-public class ExprDBError extends SimpleExpression<String> {
-  static {
-    Skript.registerExpression(ExprDBError.class, String.class,
-        ExpressionType.SIMPLE, "[the] [last] (sql|db|data(base|[ ]source)) error");
-  }
-
-  @Override
-  protected String[] get(Event e) {
-    return new String[]{EffExecuteStatement.lastError};
-  }
-
-  @Override
-  public boolean isSingle() {
-    return true;
-  }
-
-  @Override
-  public Class<? extends String> getReturnType() {
-    return String.class;
-  }
-
-  @Override
-  public String toString(Event e, boolean debug) {
-    return "last database error";
-  }
-
-  @Override
-  public boolean init(Expression<?>[] exprs, int matchedPattern, Kleenean isDelayed, SkriptParser.ParseResult parseResult) {
-    return true;
-  }
-}