No need for restez_connect()

[joelnitta]

As of restez v2.1.0, there is no need for the user to call restez_connect(). Making unnecessary connections to the database can cause warnings or errors, so this should be avoided.

That means lines like this:

phylotaR/R/stage2.R

Lines 24 to 25 in 861fa66

	suppressMessages(restez::restez_connect())
	on.exit(restez::restez_disconnect())

can (and should) be safely deleted.

[ShixiangWang]

@joelnitta Thanks :)