RFR: JDK-8289741 : Remove unused imports from DTDBuilder.java [v3]

[ScientificWare]

> This is tracked in JBS as
> 
> [JDK-8289741](https://bugs.openjdk.org/browse/JDK-8289741) and duplicated by [JDK-8290070](https://bugs.openjdk.org/browse/JDK-8290070)
> 
> Unused imports in DTDBuider.java.
> 
>> **Remove unused imports from DTDBuilder.java**
> 
> Some imports are no more used.
> 
> - java.io.FileNotFoundException;
> - java.io.BufferedInputStream;
> - java.io.OutputStream;
> - java.util.BitSet;
> - java.util.StringTokenizer;
> - java.util.Properties;
> - java.util.zip.DeflaterOutputStream;
> - java.util.zip.Deflater;
> - java.net.URL;
> 
> https://github.com/scientificware/jdk/issues/4

ScientificWare has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains ten additional commits since the last revision:

 - Merge branch 'openjdk:master' into scientificware-patch-001-DTDBuilder
 - Merge branch 'openjdk:master' into scientificware-patch-001-DTDBuilder
 - Merge branch 'openjdk:master' into scientificware-patch-001-DTDBuilder
 - Merge branch 'openjdk:master' into scientificware-patch-001-DTDBuilder
 - Merge branch 'openjdk:master' into scientificware-patch-001-DTDBuilder
 - Merge branch 'openjdk:master' into scientificware-patch-001-DTDBuilder
 - Merge branch 'openjdk:master' into scientificware-patch-001-DTDBuilder
 - Merge branch 'openjdk:master' into scientificware-patch-001-DTDBuilder
 - Remove unused imports.
   
   Some imports are no more used.
   
   - java.io.FileNotFoundException;
   - java.io.BufferedInputStream;
   - java.io.OutputStream;
   - java.util.BitSet;
   - java.util.StringTokenizer;
   - java.util.Properties;
   - java.util.zip.DeflaterOutputStream;
   - java.util.zip.Deflater;
   - java.net.URL;

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/9360/files
  - new: https://git.openjdk.org/jdk/pull/9360/files/6d097e77..ea243462

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=9360&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=9360&range=01-02

  Stats: 109079 lines in 2656 files changed: 58161 ins; 33308 del; 17610 mod
  Patch: https://git.openjdk.org/jdk/pull/9360.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/9360/head:pull/9360

PR: https://git.openjdk.org/jdk/pull/9360