[Java] Simplify Ray.init() by invoking ray start internally (#10762)

java/api/src/main/java/io/ray/api/runtimecontext/RuntimeContext.java

@@ -28,16 +28,6 @@ public interface RuntimeContext {
    */
   boolean wasCurrentActorRestarted();
 
-  /**
-   * Get the raylet socket name.
-   */
-  String getRayletSocketName();
-
-  /**
-   * Get the object store socket name.
-   */
-  String getObjectStoreSocketName();
-
   /**
    * Return true if Ray is running in single-process mode, false if Ray is running in cluster mode.
    */