I have three copies of Skype. How do I remove them from Launchpad?

I have three copies of Skype. How do I remove them from Launchpad?

First make sure you don't really have three copies of the Application. You can use spotlight to clean out any duplicates and keep one copy of the application mounted.
Once that is resolved, you can delete the duplicates from Launchpad one by one; if they all go, just reinstall Skype.
You can also force Launchpad to recreate its database, if it is corrupt, or just to refresh the apps alphabetically by using this hack:
sudo rm ~/Library/Application\ Support/Dock/*.dbsudo killall Dock to restart Dock and LaunchpadJust be aware that you will use any user-defined grouping/sorting etc. this way.
Another wonderful high-level (and safe with undos and backups) GUI solution is Launchpad control, which is a system preference panel.
defaults write com.apple.dock ResetLaunchPad -bool true; killall Dock to flag the database for reconstruction, then to restart the dock.
– CyberSkull
Nov 14 '15 at 22:45
Pretty simple, in the new OS X (OS X El Capitan), follow the following instructions:
Hope this helped! :D
I couldn't find where the duplicate was with spotlight so I just launched it, right-clicked it's icon on the Dock (or ctrl + click), selected Options -> Show in Finder and found the duplicate. After deleting it I entered the following command in Terminal (not sure if this step was necessary):
killall Dock
Then in Launchpad I deleted the duplicate (whose icon was displayed with a question mark) by long clicking it and then clicking the X button.
Search for the app in your Finder by typing in the name of the app into the Search box in the upper right hand corner. For example, if you have three Gmail apps which you are attempting to remove, type in Gmail. All the apps with that name will appear. Search for the apps you want to delete and drag them into the trash. It is really THAT easy.