Remove unnecessary "throws" declarations

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=201058582

java/google/registry/model/ofy/OfyFilter.java

@@ -32,7 +32,7 @@ public class OfyFilter implements Filter {
   }
 
   @Override
-  public void init(FilterConfig config) throws ServletException {
+  public void init(FilterConfig config) {
     // Make sure that we've registered all types before we do anything else with Objectify.
     ObjectifyService.initOfy();
   }