Revert "PrinterOutputDevice: Adding isConnectionState"
Revert "PrinterOutputDevice: Adding isConnectionState"

1. Shouldn't go directly to upstream's master
2. GitHub still loves to kill the last line

This reverts commit bafaf16fcbba5867353d012509f27c1c3f1a8d8f.

ynotstartups/Wanhao,fieldOfView/Cura,fieldOfView/Cura,Curahelper/Cura,Curahelper/Cura,ynotstartups/Wanhao,hmflash/Cura,hmflash/Cura