Build: Explicitly exclude the queue module from the slim build

The queue module is not present in the slim build as it depends on deferred
and our Gruntfile specifies excluding deferred should also exclude queue:
https://github.com/jquery/jquery/blob/3.5.1/Gruntfile.js#L66
This commit makes this exclusion explicit so that the queue module never
accidentally gets re-included in the slim build if it stopped importing from
the deferred module directly.

Closes gh-4793

build/tasks/build.js

@@ -60,7 +60,7 @@ module.exports = function( grunt ) {
 		const done = this.async();
 
 		try {
-			const slimFlags = [ "-ajax", "-callbacks", "-deferred", "-effects" ];
+			const slimFlags = [ "-ajax", "-callbacks", "-deferred", "-effects", "-queue" ];
 			const flags = this.flags;
 			const optIn = flags[ "*" ];
 			let name = grunt.option( "filename" );