As commonly as we konw any npm module is installed by a simple pattern saying : npm install <module_name>

I have installed a few modules that I do not user anymore and I just want to get them off. I have a few questions regarding this:

• Do we have any command or process to uninstall a module from the root (something like npm uninstall <module_name>) or simply removing the module files will do?

• How does it affect if we keep the unused modules?