Remove redundant cast.

ralf0131 · ralf0131 · commit b0b14539c914 · 2018-05-16T17:01:29.000+08:00
diff --git a/dubbo-config/dubbo-config-api/src/main/java/com/alibaba/dubbo/config/ServiceConfig.java b/dubbo-config/dubbo-config-api/src/main/java/com/alibaba/dubbo/config/ServiceConfig.java
@@ -757,7 +757,7 @@ public void setInterface(Class<?> interfaceClass) {
             throw new IllegalStateException("The interface class " + interfaceClass + " is not a interface!");
         }
         this.interfaceClass = interfaceClass;
-        setInterface(interfaceClass == null ? (String) null : interfaceClass.getName());
+        setInterface(interfaceClass == null ? null : interfaceClass.getName());
     }
 
     public T getRef() {

Original file line number	Diff line number	Diff line change
`@@ -757,7 +757,7 @@ public void setInterface(Class<?> interfaceClass) {`
`757`	`757`	`throw new IllegalStateException("The interface class " + interfaceClass + " is not a interface!");`
`758`	`758`	`}`
`759`	`759`	`this.interfaceClass = interfaceClass;`
`760`		`- setInterface(interfaceClass == null ? (String) null : interfaceClass.getName());`
	`760`	`+ setInterface(interfaceClass == null ? null : interfaceClass.getName());`
`761`	`761`	`}`
`762`	`762`
`763`	`763`	`public T getRef() {`