Fix README

There was a sentence that came from the `nix-build-action` project,
which doesnt, make sense here.

This action is more straightforward regarding interactions.

Author: samueldr

README.md

@@ -82,8 +82,6 @@ Configuring the action
 
 There are a couple inputs you can provide to this action.
 
-Be mindful about interactions between some inputs. Read [the script](do-nix-build) and [the action](action.yml) to better understand how they interact.
-
 <!-- ACTION.YML INPUTS START -->
 
 ### `additional-apt-patterns`