we are using variable set for diff forms how to hide variable sets variables in new form

[gm6]

Hi 

we have a variable set which using in diff forms

common_server_variables is a variable set, under this we have few variables:

cpu_count
image
site
reason

we need to hide 'reason' variable form the variable set in new form, also common_server_variable use UI policies in new form for remaining variables "cpu_count" "image" "site"

Thanks