Register 'bxt_remove_punchangles" if V_CalcRefDef found

[SmileyAG]

In modifications as Cry of Fear and PARANOIA - function V_PunchAxis not used and code deleted from it.

Those mods writes punch values to vuser3 variable, PM_DropPunchAngle converts vuser3 to punchangle, which in the end applies to viewangles in V_CalcNormalRefdef.

Set pparams->punchangle to 0.0f is enough to disable the entire punch system in that two mods.