[meta] Remove unavailable testing script

dewren99 · ljharb · commit 0ebda7eea397 · 2023-05-01T11:23:38.000-07:00
Fixes #3104
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
@@ -74,8 +74,6 @@ Verify your changes
 
 ```
 npm test
-# or
-npm run tests-only
 ```
 
 Push your changes
