update node terminal mac and remove previous version code example

Example 1: brew uninstall node

brew uninstall node;
which node;
sudo rm -rf /usr/local/bin/node;
sudo rm -rf /usr/local/lib/node_modules/npm/;
brew doctor;
brew cleanup --prune-prefix;

Example 2: uninstall node

In IOS terminal:
brew uninstall node

Use sudo if ask for permitions