Revert "HDFS-12515. Ozone: mvn package compilation fails on HDFS-7240. Contributed by Anu Engineer."

This fix was need because of change in Trunk. That patch has been reverted and change proposed by this
patch will be applied in trunk. So reverting now to match the changes in trunk. Please see the JIRA for
details.

This reverts commit 244e7a5f65c3611d2091d91a8899ac5785fcff3c.

hadoop-mapreduce-project/hadoop-mapreduce-examples/pom.xml

@@ -34,13 +34,6 @@
   </properties>
 
   <dependencies>
-      <!-- Adding this dependency makes this build in ozone !-->
-      <dependency>
-          <groupId>org.slf4j</groupId>
-          <artifactId>slf4j-api</artifactId>
-      </dependency>
-      <!-- but this not needed in trunk !-->
-
     <dependency>
       <groupId>commons-cli</groupId>
       <artifactId>commons-cli</artifactId>