Windows 8 just does not provide the GUI to perform certain operations. For example, you cannot remove the network profile for a wireless network. This cannot be done with the Charms Bar nor using the Network and Sharing Center.
This is an important operation because it is all too easy to click and join many networks. And over time you may want to change the settings or just remove some of those wireless network profiles. Thankfully, you can still do this from the command prompt.
To list all the wireless network profiles:
C:\> netsh wlan show profiles
To remove a wireless network profile named
C:\> netsh wlan delete profile name="foobar"
Tried with: Windows 8 x64