Update expected output

The client now only gets messages it hasn't seen before.

basice2e/clients.goldoutput/client12.out

@@ -2,6 +2,4 @@ Sending Message to 2, Jim: Hello, 2
 Message from channel 31, #General: Message from 5, Spencer Received: Channel, Hello
 Message from 4, Rick Received: Hello, 1
 Sending Message to 2, Jim: Hello, 2
-Message from channel 31, #General: Message from 5, Spencer Received: Channel, Hello
-Message from 4, Rick Received: Hello, 1
 Message from 4, Rick Received: Hello, 1

basice2e/clients.goldoutput/client23.out

@@ -2,6 +2,4 @@ Sending Message to 3, Ben: Hello, 3
 Message from channel 31, #General: Message from 5, Spencer Received: Channel, Hello
 Message from 1, David Received: Hello, 2
 Sending Message to 3, Ben: Hello, 3
-Message from channel 31, #General: Message from 5, Spencer Received: Channel, Hello
-Message from 1, David Received: Hello, 2
 Message from 1, David Received: Hello, 2

basice2e/clients.goldoutput/client34.out

@@ -2,6 +2,4 @@ Sending Message to 4, Rick: Hello, 4
 Message from channel 31, #General: Message from 5, Spencer Received: Channel, Hello
 Message from 2, Jim Received: Hello, 3
 Sending Message to 4, Rick: Hello, 4
-Message from channel 31, #General: Message from 5, Spencer Received: Channel, Hello
-Message from 2, Jim Received: Hello, 3
 Message from 2, Jim Received: Hello, 3

basice2e/clients.goldoutput/client41.out

@@ -2,6 +2,4 @@ Sending Message to 1, David: Hello, 1
 Message from channel 31, #General: Message from 5, Spencer Received: Channel, Hello
 Message from 3, Ben Received: Hello, 4
 Sending Message to 1, David: Hello, 1
-Message from channel 31, #General: Message from 5, Spencer Received: Channel, Hello
-Message from 3, Ben Received: Hello, 4
 Message from 3, Ben Received: Hello, 4