fix: remove unnecessary plugin check

Author: laurelfulford

includes/class-modal-checkout.php

@@ -947,15 +947,14 @@ public static function remove_hooks() {
 				]
 			);
 		}
-		if ( is_plugin_active( 'onesignal-free-web-push-notifications/onesignal.php' ) ) {
-			array_push(
-				$remove_list,
-				[
-					'hook'     => 'wp_head',
-					'callback' => 'onesignal_init',
-				]
-			);
-		}
+		// OneSignal.
+		array_push(
+			$remove_list,
+			[
+				'hook'     => 'wp_head',
+				'callback' => 'onesignal_init',
+			]
+		);
 
 		/**
 		 * Filters the hooks to remove from the modal checkout.