painless execute api was set not to generate however we implemented this as part of 6.3

(cherry picked from commit 9c212b5)

Author: Mpdreamz

src/CodeGeneration/ApiGenerator/ApiGenerator.cs

@@ -84,8 +84,6 @@ public static void Generate(string downloadBranch, params string[] folders)
 			"xpack.sql.translate.json",
 			"xpack.ssl.certificates.json",
 
-			"scripts_painless_execute.json",
-
 			// 6.4 new  API's
 
 			"xpack.ml.update_filter.json",