Remove renv and other sundry items #7

Job	Run time
Version Bump 🤜🤛	0s
Get R version	1s
Links / Validate Links	13s
Check / (release)	3m 25s
Check / (devel)	1m 2s
Check / (oldrel)	3m 11s
Documentation	0s
Render README	0s
Validation	0s
Lint / Lint	1m 33s
Code Coverage / Test Coverage	1m 49s
Man Pages / Roxygen	1m 27s
Spelling / Spellcheck	1m 17s
Code Style / Code Style	1m 19s
Check Templates / Verify	1m 28s
Code Coverage / Generate badge for coverage	38s
	17m 23s

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