chore: Fix junit migration issues

Author: lqiu96

google-cloud-logging/src/test/java/com/google/cloud/logging/ContextHandlerTest.java

@@ -16,7 +16,7 @@
 
 package com.google.cloud.logging;
 
-import static org.junit.jupiter.api.Assertions.*;
+import static org.junit.jupiter.api.Assertions.assertEquals;
 
 import com.google.cloud.logging.ContextHandler.ContextPriority;
 import com.google.cloud.logging.HttpRequest.RequestMethod;

google-cloud-logging/src/test/java/com/google/cloud/logging/LoggingHandlerTest.java

@@ -238,11 +238,6 @@ static class CustomLevel extends Level {
 
   public final OutputStreamPatcher outputStreamPatcher = new OutputStreamPatcher();
 
-  @org.junit.jupiter.api.AfterEach
-  void tearDownPatcher() {
-    outputStreamPatcher.after();
-  }
-
   @BeforeEach
   void setUp() {
     Instrumentation.setInstrumentationStatus(true);
@@ -260,6 +255,7 @@ void setUp() {
   @AfterEach
   void after() {
     verify(logging, options);
+    outputStreamPatcher.after();
   }
 
   private static LogRecord newLogRecord(Level level, String message) {