Code Modernization: Remove error suppression from parse_url() calls.

Previously, the `@` operator was used to prevent possible warnings emitted by `parse_url()` in PHP < 5.3.3 when URL parsing failed.

Now that the minimum version of PHP required by WordPress is 5.6.20, this is no longer needed.

Props netpassprodsr, Howdy_McGee.
Fixes #49980. See #24780.

git-svn-id: https://develop.svn.wordpress.org/trunk@47617 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/class-wp-http-proxy.php

@@ -167,11 +167,7 @@ class WP_HTTP_Proxy {
 	 * @return bool True, to send through the proxy and false if, the proxy should not be used.
 	 */
 	public function send_through_proxy( $uri ) {
-		/*
-		 * parse_url() only handles http, https type URLs, and will emit E_WARNING on failure.
-		 * This will be displayed on sites, which is not reasonable.
-		 */
-		$check = @parse_url( $uri );
+		$check = parse_url( $uri );
 
 		// Malformed URL, can not process, but this could mean ssl, so let through anyway.
 		if ( false === $check ) {