Go into Administration > Manage Privileges and set your security correctly.
Setting the security and customize based on your need is supposed to be one of the first things you do. You can hide most of these things for the consumer application role, but can't hide it completely as there are things like the "signed in as..." which will always be there ...
I got it ,Thanks Gianni ceresa
If there is one or 2 of these things that still keep being on screen and can't find which privilege manage it just post back here
If you got everything you were looking for also consider closing the thread.