npm-prune (3) - Linux Manuals
npm-prune: Remove extraneous packages
NAME
npm-prune -- Remove extraneous packagesSYNOPSIS
npm.commands.prune([packages,] callback)
DESCRIPTION
This command removes "extraneous" packages.The first parameter is optional, and it specifies packages to be removed.
No packages are specified, then all packages will be checked.
Extraneous packages are packages that are not listed on the parent package's dependencies list.