Revert raylet to worker GRPC communication back to asio (#5450)

java/test/src/main/java/org/ray/api/test/BaseTest.java

@@ -24,7 +24,11 @@ public class BaseTest {
     // These files need to be deleted after each test case.
     filesToDelete = ImmutableList.of(
         new File(Ray.getRuntimeContext().getRayletSocketName()),
-        new File(Ray.getRuntimeContext().getObjectStoreSocketName())
+        new File(Ray.getRuntimeContext().getObjectStoreSocketName()),
+        // TODO(pcm): This is a workaround for the issue described
+        // in the PR description of https://github.com/ray-project/ray/pull/5450
+        // and should be fixed properly.
+        new File("/tmp/ray/test/raylet_socket")
     );
     // Make sure the files will be deleted even if the test doesn't exit gracefully.
     filesToDelete.forEach(File::deleteOnExit);

java/test/src/main/java/org/ray/api/test/ResourcesManagementTest.java

@@ -102,4 +102,3 @@ public class ResourcesManagementTest extends BaseTest {
   }
 
 }
-