Polishing.

Remove unused code.

See #1321
Original pull request: #1322

spring-data-cassandra/src/main/java/org/springframework/data/cassandra/observability/ObservationBeanPostProcessor.java

@@ -1,47 +0,0 @@
-/*
- * Copyright 2022 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.data.cassandra.observability;
-
-import org.springframework.beans.BeansException;
-import org.springframework.beans.factory.config.BeanPostProcessor;
-import org.springframework.data.cassandra.ReactiveSession;
-
-import com.datastax.oss.driver.api.core.CqlSession;
-
-import io.micrometer.observation.ObservationRegistry;
-
-class ObservationBeanPostProcessor implements BeanPostProcessor {
-
-	public final ObservationRegistry observationRegistry;
-
-	public ObservationBeanPostProcessor(ObservationRegistry observationRegistry) {
-		this.observationRegistry = observationRegistry;
-	}
-
-	@Override
-	public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
-
-		if (bean instanceof CqlSession) {
-			return ObservableCqlSessionFactory.wrap((CqlSession) bean, observationRegistry);
-		}
-
-		if (bean instanceof ReactiveSession) {
-			return ObservableReactiveSessionFactory.wrap((ReactiveSession) bean, observationRegistry);
-		}
-
-		return BeanPostProcessor.super.postProcessAfterInitialization(bean, beanName);
-	}
-}