Update README.md

Author: LucFF

learning_pine_roadmap/README.md

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 # Learning Pine Roadmap
 
-### Introduction
-
 This document aims to provide information that will be useful for newcomers to the [Pine Script](https://www.tradingview.com/pine-script-docs/en/v4/Introduction.html) programming language. Pine Script is the programming language used on the [TradingView](http://www.tradingview.com) charting platform.
 
 ### Table of Contents