[KYUUBI #413] [MINOR]: remove unused class import

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### _Why are the changes needed?_
remove unused class import

### _How was this patch tested?_
- [ ] Add some test cases that check the changes thoroughly including negative and positive cases if possible

- [ ] Add screenshots for manual tests if appropriate

- [ ] [Run test](https://kyuubi.readthedocs.io/en/latest/tools/testing.html#running-tests) locally before make a pull request

Closes #413 from MyLanPangzi/master.

dc6f65a [hiscat] [MINOR]: remove unused class import

Lead-authored-by: MyLanPangzi <1251723871@qq.com>
Co-authored-by: hiscat <46845236+MyLanPangzi@users.noreply.github.com>
Signed-off-by: Cheng Pan <379377944@qq.com>
(cherry picked from commit 8f44d0b4cf)
Signed-off-by: Cheng Pan <379377944@qq.com>

kyuubi-main/src/main/scala/org/apache/kyuubi/engine/ProcBuilder.scala

@@ -17,7 +17,7 @@
 
 package org.apache.kyuubi.engine
 
-import java.io.{File, FilenameFilter, IOException}
+import java.io.{File, IOException}
 import java.nio.charset.StandardCharsets
 import java.nio.file.{Files, Path}