RFR: 8265793: Remove duplicate jtreg TEST.groups references for some client tests

[Phil Race]

Delete some duplicates

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

Commit messages:
 - 8265793: Remove duplicate jtreg TEST.groups references for some client tests

Changes: https://git.openjdk.java.net/jdk/pull/3642/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=3642&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8265793
  Stats: 4 lines in 1 file changed: 0 ins; 4 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3642.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3642/head:pull/3642

PR: https://git.openjdk.java.net/jdk/pull/3642