Fixes

Fix build by removing dead dependency.

Per the announcment: https://about.codecov.io/blog/message-regarding-the-pypi-package/ coddev deprecated their pypi package on april 12, 2023 causing the build to break

We no longer are registered at codedev: https://app.codecov.io/gh/sendgrid/sendgrid-python "This repo has been deactivated"

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[x] I have added tests that prove my fix is effective or that my feature works
[x] I have added the necessary documentation about the functionality in the appropriate .md file
[x] I have added inline documentation to the code I modified

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sendgrid / sendgrid-python