remove legacy code.

Author: selul

inc/url_replacer.php

@@ -42,49 +42,6 @@ public static function instance() {
 		return self::$instance;
 	}
 
-	/**
-	 * A filter which turns a local url into an optimized CDN image url or an array of image urls.
-	 *
-	 * @param string|array $url The url which should be replaced.
-	 *
-	 * @return string|array Replaced url.
-	 */
-	public function replace_option_url( $url ) {
-		if ( empty( $url ) ) {
-			return $url;
-		}
-
-		// $url might be an array or an json encoded array with urls.
-		if ( is_array( $url ) || filter_var( $url, FILTER_VALIDATE_URL ) === false ) {
-			$array   = $url;
-			$encoded = false;
-
-			// it might a json encoded array
-			if ( is_string( $url ) ) {
-				$array   = json_decode( $url, true );
-				$encoded = true;
-			}
-
-			// in case there is an array, apply it recursively.
-			if ( is_array( $array ) ) {
-				foreach ( $array as $index => $value ) {
-					$array[ $index ] = $this->replace_option_url( $value );
-				}
-
-				if ( $encoded ) {
-					return json_encode( $array );
-				}
-
-				return $array;
-			}
-
-			if ( filter_var( $url, FILTER_VALIDATE_URL ) === false ) {
-				return $url;
-			}
-		}
-
-		return apply_filters( 'optml_content_url', $url );
-	}
 
 	/**
 	 * The initialize method.