Remove LPAREN and RPAREN from TokenParser.

[nojaf]

Similar to #2035 and #2033.

[baronfel]

it's really great to see how the syntax tree additions are reducing the amount of token-based workarounds you had before. much clearer this way, in my opinion!

[nojaf]

Yup, I really want to get rid of

fantomas/src/Fantomas/TokenParser.fs

Lines 1122 to 1130 in 5cf0d01

	let private tokenNames =
	[ "EQUALS"
	"BAR"
	"TRY"
	"FINALLY"
	"WITH"
	"MEMBER"
	"AND_BANG"
	"IN" ]

These are all the trivia anchors found in the tokens, each time we want to use one of those, we need to construct an estimated range and wing it CodePrinter. So much easier if they are in the tree.

Equals and With are tackled in the next FCS.