Fixes checkstyle errors (#7090)

shardingsphere-control-panel/shardingsphere-orchestration/shardingsphere-orchestration-core/shardingsphere-orchestration-core-config/src/main/java/org/apache/shardingsphere/orchestration/core/config/ConfigCenter.java

@@ -220,7 +220,7 @@ public final class ConfigCenter {
      * @param schemaName schema name
      * @return data source configurations
      */
-    @SuppressWarnings({"unchecked"})
+    @SuppressWarnings("unchecked")
     public Map<String, DataSourceConfiguration> loadDataSourceConfigurations(final String schemaName) {
         if (!hasDataSourceConfiguration(schemaName)) {
             return new LinkedHashMap<>();

shardingsphere-control-panel/shardingsphere-orchestration/shardingsphere-orchestration-core/shardingsphere-orchestration-core-config/src/main/java/org/apache/shardingsphere/orchestration/core/config/listener/SchemaChangedListener.java

@@ -124,7 +124,7 @@ public final class SchemaChangedListener extends PostOrchestrationRepositoryEven
                 ? createDataSourceChangedEvent(shardingSchemaName, event) : createRuleChangedEvent(shardingSchemaName, event);
     }
     
-    @SuppressWarnings({"unchecked"})
+    @SuppressWarnings("unchecked")
     private DataSourceChangedEvent createDataSourceChangedEvent(final String shardingSchemaName, final DataChangedEvent event) {
         Map<String, YamlDataSourceConfiguration> dataSourceConfigurations = (Map) YamlEngine.unmarshal(event.getValue());
         Preconditions.checkState(null != dataSourceConfigurations && !dataSourceConfigurations.isEmpty(), "No available data sources to load for orchestration.");