Bug 13193: (RM follow-up) Remove Cache::Memcached::Fast from PerlDependencies

We replaced this module with Cache::Memcached::Fast::Safe and so do not
need to depend upon it any longer.

Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>

C4/Installer/PerlDependencies.pm

@@ -262,11 +262,6 @@ our $PERL_DEPS = {
         'required' => '1',
         'min_ver'  => '1.30'
     },
-    'Cache::Memcached::Fast' => {
-        'usage'    => 'Caching',
-        'required' => '0',
-        'min_ver'  => '0.19'
-    },
     'Cache::Memcached::Fast::Safe' => {
         'usage'    => 'Caching',
         'required' => '0',