Fix stderr for test

Mark-Simulacrum · Mark-Simulacrum · commit e5532435d0aa · 2020-02-23T20:09:31.000-05:00
diff --git a/src/test/ui/generator/async-generator-issue-67158.stderr b/src/test/ui/generator/async-generator-issue-67158.stderr
@@ -6,4 +6,3 @@ LL |     async { yield print!(":C") };
 
 error: aborting due to previous error
 
-For more information about this error, try `rustc --explain E0727`.

Original file line number	Diff line number	Diff line change
`@@ -6,4 +6,3 @@ LL \| async { yield print!(":C") };`
`6`	`6`
`7`	`7`	`error: aborting due to previous error`
`8`	`8`
`9`		-For more information about this error, try `rustc --explain E0727`.