Remove unnecessary generic type arguments

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=175155365

java/google/registry/flows/CheckApiAction.java

@@ -144,9 +144,7 @@ public class CheckApiAction implements Runnable {
   }
 
   private Map<String, Object> fail(String reason) {
-    return ImmutableMap.<String, Object>of(
-        "status", "error",
-        "reason", reason);
+    return ImmutableMap.of("status", "error", "reason", reason);
   }
 
   /** Dagger module for the check api endpoint. */