Can "revision authors" be dropped from a paper?
I believe: The OP has written, but not submitted, a manuscript, which they discussed with some potential co-authors, who provided minimal input.
If the OP didn't discuss authorship, then they can immediately proceed to submission without listing the potential co-authors. (Discussion doesn't generally merit co-authorship.) Even if authorship was discussed, they may be able to immediately proceed, it really depends on the discussion.
For instance, the OP may have offered co-authorship in exchange for help...with the design and intellectual work and if there's no evidence of fulfillment, the OP can immediately submit without listing the potential co-authors. It gets tricky when the OP is unsatisfied, but there's evidence of partial fulfilment.
If the OP is in a position to immediately submit, then they are under no obligation to communicate with the potential co-authors. Nonetheless, the OP could send a thank you email, e.g., Thanks for your input on XYZ. Your wisdom helped improve my manuscript (attached), which I'll be submitting to ABC. I've listed you in my acknowledgements, which I trust is okay.
For trickier situations, I'd need more information to offer advice.