You will need Meteor installed and have a project created. You should also have a terminal window open and navigate to the root folder of your project. For example, if the name of your project is packagesTest, located in the ~/Documents/MeteorProjects folder, enter the following command in a terminal window:

$ cd ~/Documents/MeteorProjects/packagesTest

Let's remove the insecure Meteor package. In your terminal window, enter the following command:

$ meteor remove insecure

This will remove the insecure package.

The meteor remove [package name] command will direct Meteor to look for the named package in your project declaration files and remove the declaration and source files for the package from your project.

It's sometimes very helpful to check and see which packages you have added to your project...