chore(shorebird_cli): remove mention of trusted testers (#657)

packages/shorebird_cli/lib/src/commands/account/create_account_command.dart

@@ -56,7 +56,7 @@ To subscribe, run ${lightCyan.wrap('shorebird account subscribe')}.
 🔑 Credentials are stored in ${lightCyan.wrap(auth.credentialsFilePath)}.
 🚪 To logout, use: "${lightCyan.wrap('shorebird logout')}".
 
-A subscription is required to use Shorebird during the Trusted Tester program.
+A subscription is required to use Shorebird.
 To subscribe, run ${lightCyan.wrap('shorebird account subscribe')}.
 
 Please let us know via Discord if we can help!

packages/shorebird_cli/lib/src/commands/account/subscribe_account_command.dart

@@ -23,8 +23,7 @@ class SubscribeAccountCommand extends ShorebirdCommand
 
   @override
   String get summary => '''
-A subscription to Shorebird's Trusted Tester program is required to publish
-patches to your apps.
+A subscription to Shorebird is required to publish patches to your apps.
 
 The subscription costs \$20 USD per month per user and is billed through Stripe.
 
@@ -89,8 +88,7 @@ Once Stripe has processed your payment, you will be able to use Shorebird to cre
 ${styleBold.wrap(red.wrap('Note: This payment link is specifically for ${styleItalic.wrap('your account')}. Do not share it with others.'))}
 
 Once you have completed your payment, please let us know on Discord or by
-replying to your invite email, so that we can add you to the Trusted Tester
-private Discord channel for live support.
+replying to your invite email, so that we can add you to the support channel for live support.
 
 Thanks for you help!
 ''');