Unbind Escape key

Hey,

I am having a small issue where I have to press Esc twice to exit Insert
mode in Vim rather than the normal once, only when Vim is being run inside
Screen.

A Stack Exchange post recommended I unbind the Escape key in Screen to fix
this (and I don't use the Escape key for anything to do with Screen at the
moment).

Would this correctly be done with :bindkey "\033", or some near variant?

Thank you,
Julius