Remove iar from transfomration params

Author: adimiz1

cloudinary-core/src/main/java/com/cloudinary/Transformation.java

@@ -748,7 +748,6 @@ public String generate(Map options) {
 
         params.put("a", Expression.normalize(angle));
         params.put("ar", Expression.normalize(options.get("aspect_ratio")));
-        params.put("iar", Expression.normalize(options.get("initial_aspect_ratio")));
         params.put("b", background);
         params.put("c", crop);
         params.put("co", color);