Remove unecessary "empty vector" comments

[ZanF21]

Addresses #2358

• Not sure if checks should be added in place of the comments

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• GCC development requires copyright assignment or the Developer's Certificate of Origin sign-off, see https://gcc.gnu.org/contribute.html or https://gcc.gnu.org/dco.html
• Read contributing guidlines
• make check-rust passes locally
• Run clang-format
• Added any relevant test cases to gcc/testsuite/rust/

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Removed unnecessary comments

[dkm]

You don't need to add more test, as the change are unlikely to break any code checks.
BUT, you still need to come with a correct git commit log message.
You can check for other commit doing similar changes to comments (look for typo check as a good example).

You can see above that everything is fine, except for the commit message that lacks a GNU ChangeLog.

You also need to state that you have read and understood the https://gcc.gnu.org/dco.html in the description of this Pull Request, and add a Signed-off-by line to your commit message. Given the nature of your change, it's not mandatory, but it will make our life easier to have it.

Thanks!

[powerboat9]

Try taking a look at, and running all/part of, gcc-git-customization.sh. There's an alias called gcc-commit-mklog that should automate part of changelog generation. You should probably also read https://www.gnu.org/prep/standards/standards.html#Change-Logs and https://gcc.gnu.org/codingconventions.html#ChangeLogs.

[CohenArthur]

thanks! the changes look good, but I agree with what Marc has said - the formatting of commits is important as we send our commits to GCC afterwards without modification. if you need help getting your commit formatted properly let me know on Zulip!

[ZanF21]

I'll get working on that asap

P.S. i will need help

[ZanF21]

mb .. took longer than expected