Removing unwanted apps and programs from Mac

Most Apple apps cannot be removed (or even moved).

Apps you installed via Drag and Drop or App Store can be removed by dragging them to the Trash.

Apps you installed with an installer can normally be dragged to the Trash, but that's now how you should do it. You need to use the uninstaller provided by the developer.

Trash – Can’t Empty or Move File To Trash

Trash – Empty When File is Locked or in Use

Try holding down the option/alt key while trying to delete the Trash. If that doesn’t work, here is some more information.

Trash FAQ     

Trash won’t empty      

Are they Apple Apps or what exactly?