RFR: 8331432: Clean up comments in GenArguments::initialize_size_info()

[xiaotaonan]

Clean up comments in GenArguments::initialize_size_info()

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Commit messages:
 - Clean up comments in GenArguments::initialize_size_info()

Changes: https://git.openjdk.org/jdk/pull/19223/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=19223&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8331432
  Stats: 2 lines in 1 file changed: 0 ins; 2 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/19223.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19223/head:pull/19223

PR: https://git.openjdk.org/jdk/pull/19223