If the apps are from the App Store they are "sandboxed" which means everything is encapsulated in the application package. Apple's recommended procedure for deleting them is...
  1. Find the app in LaunchPad
  2. Click and hold until the icon begins to shake and a circle with an X appears at the top left of the app icon
  3. Click on the circled X
  4. When prompted click on Delete


That is all that is required.


"All you've got to do is own up to your ignorance
honestly, and you'll find people who are eager to
fill your head with information"
--Walt Disney