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/common/TimeOfYear.java

@@ -73,7 +73,7 @@ public class TimeOfYear extends ImmutableObject {
   /**
    * Returns an {@link Iterable} of {@link DateTime}s of every recurrence of this particular
    * time of year within a given {@link Range} (usually one spanning many years).
-   * 
+   *
    * <p>WARNING: This can return a potentially very large {@link Iterable} if {@code END_OF_TIME}
    * is used as the upper endpoint of the range.
    */