Mate,
Whoever told you about removing the line running stock boost is a retard and should go back to having sex with their cousin's pig and not procreating so another tard takes up the rest of the worlds collective oxygen supply.
How are you determining it was standard boost? Are you looking at the stock gauge?
It's NOT possible the boost was put into a "safe mode" because the actuator is mechanical, it relies on pressure. If you disconnect the hoses you've mentioned you're removing the pressure the actuator is affected by (this has been said already!) What you're thinking of here is when your engine sees lots of air from the AFM (air flow meter) your computer will retard the timing and richen the AFR (air fuel ratio).. this is known as R+R.
If you want stock boost - do what everyone has said.
If you want a blown up car and annoy people - keep askin questions and not taking advice that's obviously in your best interest.
If you want to run no boost, wire up the wastegate actuator so it's always open (I'd be running my engine in like this).
Also, if you check howstuffworks.com there's some good info there on turbos etc they have a great diagram that shows how the wastegate actuator is actually actuated!
Not having a go but this thread is freakin frustrating... Beer Baron, wrxhoon, blind_elk - plenty of others have told you.