Even after disabling and uninstalling a SharePoint feature along with uninstalling and removing SharePoint solution, the .webpart files are still getting listed in "Web Part Gallery".
I issued the commands in the following sequence:
Disable-SPFeature
Uninstall-SPFeature
Uninstall-SPSolution
Remove-SPSolution
I could still see that .webpart files are hanging around. Imagine that I know the web part file names (say abc.webpart), how can I clean them up (totally remove) using SharePoint PowerShell.