s3:lib: Remove popt_samba3

s3:lib: Remove popt_samba3

                _|_
                 |
             .-'''''-.
          .-'    '-.
       .-'  :::::_:::::  '-.
   ___/ ==:...:::-:::...:== \___
  /_____________________________\
':'-._________________________.-'_
 ':::\ @-,`-[-][-^-][-]-`,-@ / _| |_
  '::| .-------------------. ||_ @ _|
   ::|=|*   ___  _  ___   *|=|'.| |
   ':| |'   ))_) )) ))_)  '| |::.^|
   _:|=|'  ((`\ (( ((     '|=|::::::.
 _| || |'        _        '| |:::::::.
|_   |=|'2003  _( )_  2021'|=|':::::.
  | || |' (   (_ ~ _)   ) '| | ':::'
  |^||=|*  )    (_)    (  *|=| '::'
     | '-------------------' .::::'
     |_____________________.::::::'
   .'___________________.::::::''
   |_______________.::::'':::'''
 .'_____________.::::::''::::''
            .:::''''     .'::::'
         .:::::''':.   .:::::'

Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>