chore: drop codecov #79

Job	Run time
Linting	9s
Installation (3.7)	1m 4s
Pytest (3.7)	1m 26s
Installation (3.8)	1m 34s
Pytest (3.8)	2m 3s
Installation (3.9)	1m 36s
Installation (3.10)	1m 40s
Pytest (3.9)	2m 48s
Installation (3.11)	1m 35s
Pytest (3.10)	1m 57s
Pytest (3.11)	2m 34s
Coverage / Update Base Coverage	10s
Coverage / Check Pull Request Coverage	0s
	18m 36s

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