docs: Remove note about prepublish not being run

Credit: @Hirse
Fixes: #16685
Reviewed-By: @iarna
PR-URL: npm/npm#17336

doc/misc/npm-scripts.md

@@ -70,11 +70,6 @@ allow users to avoid the confusing behavior of existing npm versions and only
 run on `npm publish` (for instance, running the tests one last time to ensure
 they're in good shape).
 
-**IMPORTANT:** As of `npm@5`, `prepublish` will _only_ be run for `npm
-publish`.  This will make its behavior identical to `prepublishOnly`, so
-`npm@6` or later may drop support for the use of `prepublishOnly`, and then
-maybe we can all forget this embarrassing thing ever happened.
-
 See <https://github.com/npm/npm/issues/10074> for a much lengthier
 justification, with further reading, for this change.