Delete the following lines from the listed files:

lib/projector/    projectorNetwork = QtCore.pyqtSignal(int)  # 
Projector network activity
lib/projector/        self.projectorNetwork.emit(S_NETWORK_RECEIVED)
lib/projector/        self.projectorNetwork.emit(S_NETWORK_SENDING)
lib/projector/        self.projectorNetwork.emit(S_NETWORK_SENDING)

    except (AttributeError, TypeError):

These lines were originally put in for network activity for each
projector; however, the network activity notification will be changed to
a generic network notification for all network activity and these lines
are now just noise.

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  Can't delete/add a projector...

Status in OpenLP:

Bug description:
  When trying to add a projector through the projector manager it won't
  connect and when opening OpenLP with the 'connect to projector on
  startup' option enabled it gives an error window.  I also cannot
  delete projector as the same window pops up with an error.  So all in
  all it won't connect.

  PC Specs:
  -Arch Linux (kernel 4.7.4)

  Steps to reproduce issue:
  1. Click on add projector
  2. Fill in info to projector
  3. Click on connect...nothing happens
  4. Click on Settins/Configure OpenLP/Projectors and enable
     the 'Connect to projectors on startup' option
  5. Close OpenLP
  6. Open OpenLP and error window pops up.
  7. Delete the projector in Projector Manager the same popup window shows up.

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