RFR: 8338101: remove old remap assertion in map_or_reserve_memory_aligned after JDK-8338058 [v2]

[Matthias Baesken]

> After [JDK-8338058](https://bugs.openjdk.org/browse/JDK-8338058) by mistake an old assertion remained in map_or_reserve_memory_aligned; this has to be removed.

Matthias Baesken has updated the pull request incrementally with one additional commit since the last revision:

  reduce indentation (use same as in other asserts in the method)

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Changes:
  - all: https://git.openjdk.org/jdk/pull/20519/files
  - new: https://git.openjdk.org/jdk/pull/20519/files/d49fc5c1..7527105a

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=20519&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=20519&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/20519.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20519/head:pull/20519

PR: https://git.openjdk.org/jdk/pull/20519