[jdk24u] RFR: 8347286: (fs) Remove some extensions from java/nio/file/Files/probeContentType/Basic.java

[kieran-farrell]

8347286: (fs) Remove some extensions from java/nio/file/Files/probeContentType/Basic.java

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Commit messages:
 - backported changes

Changes: https://git.openjdk.org/jdk24u/pull/130/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk24u&pr=130&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8347286
  Stats: 13 lines in 1 file changed: 0 ins; 11 del; 2 mod
  Patch: https://git.openjdk.org/jdk24u/pull/130.diff
  Fetch: git fetch https://git.openjdk.org/jdk24u.git pull/130/head:pull/130

PR: https://git.openjdk.org/jdk24u/pull/130