Bug 11926: Follow-up - remove SearchEngine pref / fix POD

Patch set reintroduced the formerly removed system preference,
just removing it again.

Also fixes complaints of the QA script about POD in the new module.

Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>

C4/UsageStats.pm

@@ -23,7 +23,9 @@ use POSIX qw(strftime);
 use LWP::UserAgent;
 use JSON;
 
-=head1 NAME C4::UsageStats
+=head1 NAME
+
+C4::UsageStats
 
 =head1 DESCRIPTION
 

koha-tmpl/intranet-tmpl/prog/en/modules/admin/preferences/admin.pref

@@ -105,14 +105,6 @@ Administration:
                   yes: Allow
                   no: "Don't Allow"
             - Mozilla persona for login
-    Search Engine:
-        -
-            - pref: SearchEngine
-              default: Zebra
-              choices:
-                Solr: Solr
-                Zebra: Zebra
-            - is the search engine used.
     Usage Stats:
         -
             - pref: UsageStatsShare