Add new rule UnnecessaryWarningSuppression (#74)

Refs pmd/pmd#5803

Author: adangel

src/main/resources/net/sourceforge/pmd/pmd-dogfood-config.xml

@@ -71,6 +71,9 @@
         <priority>1</priority>
     </rule>
     <!--     <rule ref="category/java/bestpractices.xml/SystemPrintln" /> -->
+    <rule ref="category/java/bestpractices.xml/UnnecessaryWarningSuppression">
+        <priority>1</priority>
+    </rule>
     <rule ref="category/java/bestpractices.xml/UnusedFormalParameter">
         <priority>1</priority>
     </rule>