[HADOOP-8993] Remove unused methods from FileUtil class

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Invalid
• Assignee: Ivan A. Veselovsky
• Reporter: Ivan A. Veselovsky
• Created: 29/Oct/12 18:36
• Updated: 30/Oct/12 11:13
• Resolved: 30/Oct/12 11:13

Description

Some methods in class org.apache.hadoop.fs.FileUtil are used neither in project code nor in tests, that is, are a dead code.
This lowers the overall coverage of that class.
The suggested patches remove the unused methods.

Note: one of #copy(5) method is unused in 0.23 branch, while is used in branch-2, so the patches for these branches are different.