internal/core/adt: silence tests once again

https://cuelang.org/cl/1218219 added TestAPIModifyingValues
but left the debug option logeval=1 set, causing this test
to be very noisy by printing unnecessary debug info to stderr.

Signed-off-by: Daniel Martí <[email protected]>
Change-Id: Iadb4f3f08c1e6b6638d4a30ead9d245ca9297ec6
Reviewed-on: https://review.gerrithub.io/c/cue-lang/cue/+/1219273
Unity-Result: CUE porcuepine <[email protected]>
TryBot-Result: CUEcueckoo <[email protected]>
Reviewed-by: Marcel van Lohuizen <[email protected]>

Author: mvdan

internal/core/adt/api_test.go

@@ -33,7 +33,7 @@ type editConfig struct {
 // Modifying values can cause a mix of non-finalized nodes as children of
 // a finalized parent. Ensure that this does not cause issues.
 func TestAPIModifyingValues(t *testing.T) {
-	ctx := cuecontext.New(cuecontext.CUE_DEBUG("logeval=1"))
+	ctx := cuecontext.New()
 
 	v := ctx.CompileString(`
         edits: [{