Hello,
This guide provides in-depth info about how to remove loading times (either with Load Removal Tool or manually) in order to submit runs for the Leaderboard, you can learn it from the videos available down below:
AUTOMATIC REMOVAL (via Loading Removal Tool) Shoutouts to LemonGrass for providing this software Download - http://www.mediafire.com/file/walcobtdj85hnsb/RGB.zip
Load Removal Tool Tutorial by Auddy [EN-US]
Load Removal Tool Tutorial by Kromer [PT-BR]
MANUAL REMOVAL
You can use any frame-by-frame tool or video editing software to do that, just keep in mind that you must take off all the time that contains the following frame on the screen:
And you can make the calculation using this website: https://www.calculator.net/time-calculator.html