Cleanup old methods (A90)

java/src/com/android/inputmethod/latin/BinaryDictionary.java

java/src/com/android/inputmethod/latin/Dictionary.java

...c/com/android/inputmethod/latin/DictionaryCollection.java

...android/inputmethod/latin/ExpandableBinaryDictionary.java

...c/com/android/inputmethod/latin/ExpandableDictionary.java

...od/latin/SynchronouslyLoadedContactsBinaryDictionary.java

...method/latin/SynchronouslyLoadedUserBinaryDictionary.java

.../com/android/inputmethod/latin/UserHistoryDictionary.java

...rc/com/android/inputmethod/latin/WhitelistDictionary.java