Revert "Findbug warning supression"

This reverts commit 744eabad03.

pom.xml

@@ -1314,13 +1314,6 @@
             <value>true</value>
           </property>
         </activation>
-        <dependencies>
-          <dependency>
-            <groupId>org.codehaus.mojo</groupId>
-              <artifactId>findbugs-maven-plugin</artifactId>
-              <version>2.5.3</version>
-          </dependency>
-        </dependencies>
         <build>
           <plugins>
             <plugin>

src/main/java/org/elasticsearch/action/admin/cluster/snapshots/create/CreateSnapshotRequest.java

@@ -94,7 +94,6 @@ public class CreateSnapshotRequest extends MasterNodeOperationRequest<CreateSnap
     }
 
     @Override
-    @edu.umd.cs.findbugs.annotations.SuppressWarnings("NP_NULL_ON_SOME_PATH")
     public ActionRequestValidationException validate() {
         ActionRequestValidationException validationException = null;
         if (snapshot == null) {