RFR: 8276687: Remove support for JDK 1.4.1 PerfData shared memory files

[Ioi Lam]

We have code in jdk.internal.jvmstat for supporting an ancient version (JDK 1.4.1). There's currently no test case for this code, so it's likely to be further bit-rotten in the future. Let's remove it now.

If anyone wants to connect to JDK 1.4.1, they can use tools from JDK 19 or earlier.

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

Commit messages:
 - 8276687: Remove support for JDK 1.4.1 PerfData shared memory files

Changes: https://git.openjdk.org/jdk/pull/10687/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=10687&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8276687
  Stats: 79 lines in 3 files changed: 1 ins; 73 del; 5 mod
  Patch: https://git.openjdk.org/jdk/pull/10687.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10687/head:pull/10687

PR: https://git.openjdk.org/jdk/pull/10687