Removed outdated bug report documentation

[jsma]

Fixes

This PR removes references to the ability to submit a bug report. "Issues" aren't enabled in Github and there isn't an ISSUE_TEMPLATE.md, so it's not clear at all how anyone would submit a bug report at the moment.

Checklist

• [x] I acknowledge that all my contributions will be made under the project's license
• [ ] I have made a material change to the repo (functionality, testing, spelling, grammar)
• [ ] I have read the Contribution Guidelines and my PR follows them
• [ ] I have titled the PR appropriately
• [ ] I have updated my branch with the main branch
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] I have added the necessary documentation about the functionality in the appropriate .md file
• [ ] I have added inline documentation to the code I modified

If you have questions, please file a support ticket.

[jsma]

Ah, I see per https://github.com/sendgrid/sendgrid-python/commit/c798252a31949b9b263f9722294eb94ba3bb1e33 and https://github.com/sendgrid/python-http-client/commit/d2267cfe3f2398653b77ddca68e2edb48e1b9ff2 that apparently a recent decision was made to no longer allow the OSS community to submit issues. At any rate, it looks like this file was simply overlooked when all of the other "how to report an issue" bits were yanked recently.

[childish-sambino]

Fixed by https://github.com/sendgrid/sendgrid-python/commit/ef1aa7293e4cda85dcba1cba4524d3e85d8e0281