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After removing the old version of Netbeans and installing the new version, I've being getting the problem. Looks like the Netbeans uninstaller removed everything related with it, except the link/shortcut, and now after I've installed the new version I always get two results in the Dash when I look for Netbeans (it also happens when I'm looking for it with the Applications Lens).
So, I'd like to know how to remove the "blank link" (that takes me nowhere when I click it).
Here is a printscreen/screenshot of the problem: