[sinan]

Here is a Kual extension to remove progress bar on Kindle PW 1 which is quite easy to adapt for other Kindles also.

It is not a perfect solution, basically what it does is to draw white rectangle over progress bar, but still works.

[moderator deleted attachment - please see below]

How to install:
1. You need to install Kual
https://www.mobileread.com/forums/sho...d.php?t=203326
2. Extract the content of the zip into extensions folder on Kindle's main directory.

Spoiler:

#!/bin/sh
  echo "Stopping hideProgressBar"
  # draw black rectangle over the percent to remove traces of information
  eips -d l=000,w=758,h=48 [-x 0 -y 977 -w 0]
  while :; do
  # draw white rectangle directly over the progress bar periodically
  eips -d l=FFF,w=758,h=48 [-x 0 -y 977 -w 0]
  eips -d l=FFF,w=758,h=48 [-x 0 -y 977 -w 0]
  usleep 1000
done