RFR: 8369311: De-problemlist 8305915 since the issue is not reproducible

[Tejesh R]

[JDK-8305915](https://bugs.openjdk.org/browse/JDK-8305915) is not reproducible with multiple CI checks. The main test java/awt/Frame/FrameLocation/FrameLocation.java which was failing is been missed in the Problem-List file, rather java/awt/Frame/SizeMinimizedTest.java is been added which still doesn't fail. So de-problemlisting with a sub-task and closing the main bug as "Not-reproducible".

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Commit messages:
 - de-porblemlist

Changes: https://git.openjdk.org/jdk/pull/27678/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=27678&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8369311
  Stats: 1 line in 1 file changed: 0 ins; 1 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/27678.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27678/head:pull/27678

PR: https://git.openjdk.org/jdk/pull/27678