RFR: JDK-8288094: cleanup old _MSC_VER handling

[Matthias Baesken]

We still handle at a number of places ancient historic _MSC_VER versions of Visual Studio releases e.g. pre VS2013 (VS2013 has _MSC_VER 1800).
This should be cleaned up, as long as it is not 3rd party code that we don't want to adjust.

Currently still supported ("valid") VS version are 2017+, see https://github.com/openjdk/jdk/blob/master/make/autoconf/toolchain_microsoft.m4 .
VALID_VS_VERSIONS="2019 2017 2022"
Even with adjusted toolchain m4 files, something older than VS2013 (also probably older than VS2015) would not be able to build jdk anymore.

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Commit messages:
 - JDK-8288094

Changes: https://git.openjdk.java.net/jdk/pull/9105/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=9105&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8288094
  Stats: 144 lines in 9 files changed: 0 ins; 131 del; 13 mod
  Patch: https://git.openjdk.java.net/jdk/pull/9105.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/9105/head:pull/9105

PR: https://git.openjdk.java.net/jdk/pull/9105