Is it safe to update-rc.d remove defaults ntp with dependency boot in place?

[Regid Ichira <gl2n30y06arv2@hotmail.com>]

  As some of you might know, the transition to dependency based
boot / insserv is causing the following lines:

    insserv: warning: current stop runlevel(s) (0 1 6) of script `ntp'
    overwrites defaults (empty).

  Is it safe for the system administrator to issue

    update-rc.d remove defaults ntp
    update-rc.d remove start 20 2 3 4 5 . stop 20 0 1 6 . ntp

?  That is, will such commands break something?

  Some references are bugs 568974 and 183460.
 		 	   		  
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