RFR: 8266328: C2: Remove InlineWarmCalls

[Vladimir Ivanov]

Remove InlineWarmCalls and all relevant code.

It was introduced long time ago and didn't get much attention since then. I don't see any value in keeping it around.
And there's incremental inlining support in C2 now.

Testing:
- [x] hs-tier1 - hs-tier2

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Commit messages:
 - Formatting
 - Merge branch 'master' into inline_warm_call.removal
 - Remove WarmCallInfo

Changes: https://git.openjdk.java.net/jdk/pull/3805/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=3805&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8266328
  Stats: 588 lines in 8 files changed: 6 ins; 560 del; 22 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3805.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3805/head:pull/3805

PR: https://git.openjdk.java.net/jdk/pull/3805