RFR: Remove the remaining mentions of AOT

[Aleksey Shipilev]

I am looking at [current Loom webrev against mainline](https://builds.shipilev.net/patch-openjdk-loom-fibers/), and notice there are left-overs after [JDK-8264805](https://bugs.openjdk.java.net/browse/JDK-8264805) removed AOT in mainline. This is probably the result of the merge that kept stale Loom-repo files whereas they were removed upstream.

Additional testing:
 - [x] Linux x86_64 fastdebug `tier1_loom` still passes.

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Commit messages:
 - Remove the remaining mentions of AOT

Changes: https://git.openjdk.java.net/loom/pull/73/files
 Webrev: https://webrevs.openjdk.java.net/?repo=loom&pr=73&range=00
  Stats: 432 lines in 3 files changed: 0 ins; 430 del; 2 mod
  Patch: https://git.openjdk.java.net/loom/pull/73.diff
  Fetch: git fetch https://git.openjdk.java.net/loom pull/73/head:pull/73

PR: https://git.openjdk.java.net/loom/pull/73