Tests: removed unneeded use of Socket module from perl_ssi.t.

Author: mdounin

perl_ssi.t

@@ -11,8 +11,6 @@ use strict;
 
 use Test::More;
 
-use Socket qw/ CRLF /;
-
 BEGIN { use FindBin; chdir($FindBin::Bin); }
 
 use lib 'lib';