RFR: 8286015 JFR: Remove jfr.save.generated.asm

[Erik Gahlin]

Could I have a review of a fix that removes the jfr.save.generated.asm property.

It was a developer property that could be set to write generated JFR .class files to disk. The mechanism doesn't work due to a bug, but nobody has noticed it for years. For debugging JFR bytecode generation, it's much more convenient to use  -Xlog:jfr+system+bytecode=trace to print ASM to standard output. 

Testing: jdk/jdk/jfr

Thanks
Erik

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Commit messages:
 - Initial

Changes: https://git.openjdk.java.net/jdk/pull/8637/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=8637&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8286015
  Stats: 32 lines in 3 files changed: 0 ins; 31 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8637.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8637/head:pull/8637

PR: https://git.openjdk.java.net/jdk/pull/8637