Email: Add unit tests covering email validation and sanitization. (Take 2)

When the original patch from PR#11552 was merged, it did not include the latest version of the PR code, which had removed a failing test.

This patch removes the failing test to match what ran in the tests on the PR.

Developed in: #11552
Discussed in: https://core.trac.wordpress.org/ticket/31992

Follow-up to: [62225].

Props agulbra, akirk, benniledl, dmsnell.
See #31992.


git-svn-id: https://develop.svn.wordpress.org/trunk@62226 602fd350-edb4-49c9-b593-d223f7449a82

Author: dmsnell

tests/phpunit/tests/formatting/sanitizeEmail.php

@@ -35,7 +35,6 @@ public function data_sanitized_email_pairs() {
 			'contains no @'                  => array( 'ab', '' ),
 			'just a TLD'                     => array( 'abc@com', '' ),
 			'plain'                          => array( 'abc@example.com', 'abc@example.com' ),
-			'invalid utf8 in local'          => array( "a\x80b@example.com", '' ),
 			'invalid utf8 subdomain dropped' => array( "abc@sub.\x80.org", 'abc@sub.org' ),
 			'all subdomains invalid utf8'    => array( "abc@\x80.org", '' ),
 		);