fix: always remove createIfNotExists from request options (#458)

Author: DevinCodes

lib/algolia/search_index.rb

@@ -303,8 +303,8 @@ def partial_update_objects(objects, opts = {})
         request_options    = symbolize_hash(opts)
         if get_option(request_options, 'createIfNotExists')
           generate_object_id = true
-          request_options.delete(:createIfNotExists)
         end
+        request_options.delete(:createIfNotExists)
 
         if generate_object_id
           IndexingResponse.new(self, raw_batch(chunk('partialUpdateObject', objects), request_options))