RFR: 8284825: sun/java2d/DirectX/MultiPaintEventTest/MultiPaintEventTest.java failed with "RuntimeException: Processed unnecessary paint()."

[Prasanta Sadhukhan]

Now that [commit](https://git.openjdk.org/jdk/commit/4072412c1fd1e28febff71c6b37a9813f22bdc4b)
has reverted [JDK-8275715](https://bugs.openjdk.org/browse/JDK-8275715)  along with the test
there's no need of keeping the non-existent test problemlisted, which we can remove

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

Commit messages:
 - JDK-8284825: sun/java2d/DirectX/MultiPaintEventTest/MultiPaintEventTest.java failed with RuntimeException: Processed unnecessary paint().

Changes: https://git.openjdk.org/jdk/pull/11933/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=11933&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8284825
  Stats: 1 line in 1 file changed: 0 ins; 1 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/11933.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11933/head:pull/11933

PR: https://git.openjdk.org/jdk/pull/11933