[jdk11u-dev] RFR: 8254318: Remove .hgtags

[George Adams]

backports https://bugs.openjdk.org/browse/JDK-8254318 as it's a low-risk change

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Commit messages:
 - Backport 62a7f5d3236ab2248518a475b1d8b71cb4bf1313

Changes: https://git.openjdk.org/jdk11u-dev/pull/1211/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1211&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8254318
  Stats: 652 lines in 1 file changed: 0 ins; 652 del; 0 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/1211.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev pull/1211/head:pull/1211

PR: https://git.openjdk.org/jdk11u-dev/pull/1211