se-edu / addressbook-level4 / 4393

94%

Pull #866

travis-ci

FileUtil: remove unsued methods and FileUtilTest

After refactoring the codebase to use java.nio.file for file/path 
handling, several methods become unused. Following that, FileUtilTest 
would be testing unused methods.

For code quality purposes, unused methods and tests should be removed. 

Let's remove unused methods in FileUtil and FileUtilTest itself.

36 of 36 new or added lines in 10 files covered. (100.0%)

1466 of 1587 relevant lines covered (92.38%)

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