Update warnings.md - jquery.fn.unload()

I think that jquery.fn.unload() should have the "is deprecated and removed" label.
.unload() was deprecated in jquery v1.8 and removed in v3.0
So if you get this "warning" it will not actually work once you remove the jquery migrate plugin.

Reference: https://api.jquery.com/unload/

Author: jp41011

warnings.md

@@ -61,7 +61,7 @@ This is _not_ a warning, but a console log message the plugin shows when it firs
 **Solution:** Change any use of `$().error(fn)` to `$().on("error", fn)`.
 
 ### \[shorthand-removed-v3\] JQMIGRATE: jQuery.fn.load() is deprecated
-### \[shorthand-removed-v3\] JQMIGRATE: jQuery.fn.unload() is deprecated
+### \[shorthand-removed-v3\] JQMIGRATE: jQuery.fn.unload() is deprecated and removed
 
 **Cause:** The `.load()` and `.unload()` event methods attach a "load" and "unload" event, respectively, to an element. They were deprecated in 1.9 and removed in 3.0 to reduce confusion with the AJAX-related `.load()` method that loads HTML fragments and which has not been deprecated. Note that these two methods are used almost exclusively with a jQuery collection consisting of only the `window` element. Also note that attaching an "unload" or "beforeunload" event on a window via any means can impact performance on some browsers because it disables the document cache (bfcache). For that reason we strongly advise against it.