cleanup: delete old doc support from the lexer and parser #8388

Job	Run time
ormolu	14s
build ucm (ubuntu-20.04)	4m 8s
build ucm (macOS-12)	9m 59s
build ucm (windows-2019)	10m 7s
generate jit source	10s
run transcripts (ubuntu-20.04)	4m 19s
run interpreter tests (ubuntu-20.04)	1m 9s
run transcripts (macOS-12)	7m 36s
run interpreter tests (macOS-12)	1m 56s
run transcripts (windows-2019)	6m 25s
build jit binary / build jit binary (ubuntu-20.04)	13s
build jit binary / build jit binary (macOS-12)	20s
build jit binary / build jit binary (windows-2019)	20s
test jit / test jit (ubuntu-20.04)	7s
test jit / test jit (macOS-12)	19s
	47m 22s

Provide feedback