Revert "MAPREDUCE-7428. Fix failures related to Junit 4 to Junit 5 upgrade in org.apache.hadoop.mapreduce.v2.app.webapp (#5209)"

This reverts commit 85ec796.

Author: steveloughran

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/pom.xml

@@ -124,26 +124,6 @@
       <artifactId>assertj-core</artifactId>
       <scope>test</scope>
     </dependency>
-    <dependency>
-      <groupId>org.junit.platform</groupId>
-      <artifactId>junit-platform-launcher</artifactId>
-      <scope>test</scope>
-    </dependency>
-    <dependency>
-      <groupId>org.junit.jupiter</groupId>
-      <artifactId>junit-jupiter-api</artifactId>
-      <scope>test</scope>
-    </dependency>
-    <dependency>
-      <groupId>org.junit.jupiter</groupId>
-      <artifactId>junit-jupiter-engine</artifactId>
-      <scope>test</scope>
-    </dependency>
-    <dependency>
-      <groupId>org.junit.platform</groupId>
-      <artifactId>junit-platform-launcher</artifactId>
-      <scope>test</scope>
-    </dependency>
   </dependencies>
 
   <build>