Masterbar: Remove unused RTL_Admin_Bar class (#17781)

Author: obenland

modules/masterbar/masterbar/masterbar.php

@@ -157,10 +157,6 @@ class_exists( 'Jetpack_AMP_Support' )
 		// We need to use user's setting here, instead of relying on current blog's text direction.
 		$this->user_text_direction = $this->user_data['text_direction'];
 
-		if ( $this->is_rtl() ) {
-			// Extend core WP_Admin_Bar class in order to add rtl styles.
-			add_filter( 'wp_admin_bar_class', array( $this, 'get_rtl_admin_bar_class' ) );
-		}
 		add_filter( 'admin_body_class', array( $this, 'admin_body_class' ) );
 
 		add_action( 'wp_before_admin_bar_render', array( $this, 'replace_core_masterbar' ), 99999 );
@@ -224,13 +220,6 @@ public function maybe_logout_user_from_wpcom( $redirect_to, $requested_redirect_
 		return $redirect_to;
 	}
 
-	/**
-	 * Get class name for RTL sites.
-	 */
-	public function get_rtl_admin_bar_class() {
-		return __NAMESPACE__ . '\RTL_Admin_Bar';
-	}
-
 	/**
 	 * Adds CSS classes to admin body tag.
 	 *