removing useless code

removing useless code

the 3 parameters :
intranetcolorstylesheet => C4::Context->preference("intranetcolorstylesheet"),
intranetstylesheet => C4::Context->preference("intranetstylesheet"),
IntranetNav => C4::Context->preference("IntranetNav"),

are filled by Auth.pm automatically, removing them in templates

Signed-off-by: Chris Cormack <crc@liblime.com>
Signed-off-by: Joshua Ferraro <jmf@liblime.com>