go/analysis/passes/unreachable/testdata: relax test for CL 638395

This test case is about to become a parse error. To allow us
to submit the change to the parser, we must relax this test.

Updates golang/go#71659
Updates golang/go#70957

Change-Id: Ic4fbfedb69d152d691dec41a94bb402149463f84
Reviewed-on: https://go-review.googlesource.com/c/tools/+/651155
Auto-Submit: Alan Donovan <adonovan@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Robert Findley <rfindley@google.com>

Author: adonovan

go/analysis/passes/unreachable/testdata/src/a/a.go

@@ -2118,11 +2118,6 @@ var _ = func() int {
 	println() // ok
 }
 
-var _ = func() {
-	// goto without label used to panic
-	goto
-}
-
 func _() int {
 	// Empty switch tag with non-bool case value used to panic.
 	switch {

go/analysis/passes/unreachable/testdata/src/a/a.go.golden

@@ -2082,11 +2082,6 @@ var _ = func() int {
 	println() // ok
 }
 
-var _ = func() {
-	// goto without label used to panic
-	goto
-}
-
 func _() int {
 	// Empty switch tag with non-bool case value used to panic.
 	switch {