Remove use v6.c from IO::Socket::INET examples.

Do we really need to include the version in such simple examples?

Author: fluca1978

doc/Type/IO/Socket/INET.pod6

@@ -13,8 +13,6 @@ Here is an example of a very simplistic "echo" server that listens on
 C<localhost>, port C<3333>:
 
 =begin code
-use v6.c;
-
 my $listen = IO::Socket::INET.new( :listen,
                                    :localhost<localhost>,
                                    :localport(3333) );
@@ -30,8 +28,6 @@ loop {
 And a client that connects to it, and prints out what the server answers:
 
 =begin code
-use v6.c;
-
 my $conn = IO::Socket::INET.new( :host<localhost>,
                                  :port(3333) );
 $conn.print: 'Hello, Perl 6';