cmd/cue: fix up help environment with new defaults

evalv3 is on by default now.

openinline is no longer on by default.
Stop documenting it for the time being, while we figure out
whether it should remain in place or not.
Right now, it doesn't seem to resolve any user issues.

Signed-off-by: Daniel Martí <[email protected]>
Change-Id: Ia608e54f26cc79a83e041f28c926a485e3336181
Reviewed-on: https://review.gerrithub.io/c/cue-lang/cue/+/1212167
TryBot-Result: CUEcueckoo <[email protected]>
Reviewed-by: Paul Jolly <[email protected]>
Unity-Result: CUE porcuepine <[email protected]>

Author: mvdan

cmd/cue/cmd/help.go

@@ -297,7 +297,7 @@ If an environment variable is unset or empty, sensible default setting is used.
 	CUE_EXPERIMENT
 		Comma-separated list of experiment flags to enable or disable:
 
-		evalv3
+		evalv3 (default true)
 			Enable the new CUE evaluator, addressing performance issues
 			and bringing a better disjunction algorithm.
 		embed
@@ -318,10 +318,6 @@ If an environment variable is unset or empty, sensible default setting is used.
 			when interacting with module registries.
 		sortfields
 			Force fields in stucts to be sorted lexicographically.
-		openinline (default true)
-			Permit disallowed fields to be selected into literal struct
-			that would normally result in a close error, mimicking evalv2
-			closedness behavior in evalv3 to aid the transition.
 
 CUE_EXPERIMENT and CUE_DEBUG are comma-separated lists of key-value strings,
 where the value is a boolean "true" or "1" if omitted. For example: