GH-8863: Remove deprecated API from previous versions

Fixes: #8863

spring-integration-scripting/src/main/java/org/springframework/integration/scripting/jsr223/KotlinScriptExecutor.java

@@ -1,46 +0,0 @@
-/*
- * Copyright 2019-2023 the original author or authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.springframework.integration.scripting.jsr223;
-
-import javax.script.Bindings;
-import javax.script.ScriptEngine;
-import javax.script.ScriptEngineManager;
-
-
-/**
- * An {@link AbstractScriptExecutor} for the Kotlin scripts support.
- *
- * @author Artem Bilan
- *
- * @since 5.2
- *
- * @deprecated since 6.2 in favor of {@link DefaultScriptExecutor} with {@code kotlin}
- * as an argument.
- */
-@Deprecated(since = "6.2", forRemoval = true)
-public class KotlinScriptExecutor extends AbstractScriptExecutor {
-
-	public KotlinScriptExecutor() {
-		super(new ScriptEngineManager().getEngineByName("kotlin"));
-	}
-
-	@Override
-	protected Object postProcess(Object result, ScriptEngine scriptEngine, String script, Bindings bindings) {
-		return result;
-	}
-
-}