Bug 14870: (followup) Remove mention of C4::Dates from C4/Debug.pm

C4::Dates is mentioned as example in C4/Debug.pm. This patch removes it.
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>

C4/Debug.pm

@@ -127,7 +127,6 @@ command with ERROR_LOG enabled for your VirtualHost.  Not intended for productio
 =item You can force the value from perl directly, like:
 
 	use C4::Debug;
-	use C4::Dates;
 	BEGIN { $C4::Debug::debug = 1; }
 	# now any other dependencies that also use C4::Debug will have debugging ON.