refactor: Remove obsolete SpringFactoriesLoader#loadFactoryNames

Author: livk-cloud

spring-cloud-context/src/main/java/org/springframework/cloud/context/refresh/ConfigDataContextRefresher.java

@@ -22,8 +22,6 @@
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 
-import org.springframework.boot.BootstrapContext;
-import org.springframework.boot.BootstrapRegistry;
 import org.springframework.boot.ConfigurableBootstrapContext;
 import org.springframework.boot.DefaultBootstrapContext;
 import org.springframework.boot.SpringApplication;
@@ -38,7 +36,6 @@
 import org.springframework.core.env.MutablePropertySources;
 import org.springframework.core.env.PropertySource;
 import org.springframework.core.env.StandardEnvironment;
-import org.springframework.core.io.support.SpringFactoriesLoader;
 
 /**
  * @author Dave Syer