Remove trailing whitespace in files

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=135386752

java/google/registry/model/domain/fee/FeeQueryResponseExtensionItem.java

@@ -58,11 +58,11 @@ public interface FeeQueryResponseExtensionItem {
     public Builder setNotAfterDateIfSupported(DateTime notAfterDate);
 
     public Builder setCommand(CommandName commandName, String phase, String subphase);
-    
+
     public Builder setPeriod(Period period);
 
     public Builder setFees(List<Fee> fees);
-    
+
     public Builder setClass(String feeClass);
   }
 }