[GitHub] [orc] dongjoon-hyun commented on pull request #614: ORC-719: Enable UnusedImports rule.

[GitBox <gi...@apache.org>]

dongjoon-hyun commented on pull request #614:
URL: https://github.com/apache/orc/pull/614#issuecomment-757360005


   To @williamhyun and reviewers, I verified this PR manually like the following by adding an example.
   ```
   $ git diff
   diff --git a/java/core/src/java/org/apache/orc/impl/AircompressorCodec.java b/java/core/src/java/org/apache/orc/impl/AircompressorCodec.java
   index 3793cba4..6110858b 100644
   --- a/java/core/src/java/org/apache/orc/impl/AircompressorCodec.java
   +++ b/java/core/src/java/org/apache/orc/impl/AircompressorCodec.java
   @@ -23,6 +23,7 @@ import io.airlift.compress.Decompressor;
    import org.apache.orc.CompressionCodec;
    import org.apache.orc.CompressionKind;
   
   +import java.io.File;
    import java.io.IOException;
    import java.nio.ByteBuffer;
   ```
   
   ```
   $ mvn checkstyle:check | grep ERROR
   Using `mvn` from path: /usr/local/bin/mvn
   [ERROR] src/java/org/apache/orc/impl/AircompressorCodec.java:[26,8] (imports) UnusedImports: Unused import - java.io.File.
   ```


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