[Remove door sensor]

Hi,

I hope you can help. 

I need  to replace my front door and there is currently an alarm sensor stuck to the frame and door. 
I never use the alarm, so I would like to remove the sensors and connection block, without setting the alarm off permanently. 

I have 6 wires going into the connector, black, red, blue, yellow, green & white. 
only the first 4 then go up to the door sensor. 
 

Can I just remove the sensor and 4 wires 

or do I have to join any together?

Ideally I would like to remove the connector box altogether. perhaps chopping the 6 wires. 
 

The alarm is a texecom veritas R8. 
 

Many thanks,

Chris