The only way to eliminate emotion from trading is to trade with a fully backtested system with clearly defined trading rules, as this will give you total confidence.
When you are absolutely confident you will make money in the long run, then after trading for a while you will start noticing that you don't give a rat's ass about the outcome of each trade anymore.
When you finally reach that mental state, then you made it as a trader![]()
I don't think this can be said any better. This is absolutely the holy grail.