help: Update unsubscribe instructions and use them on unsubcribe page.

help/include/unsubscribe-user-from-channel.md

@@ -1,7 +1,4 @@
-{!admin-only.md!}
-
-Anyone can always [unsubscribe themselves from a
-channel](/help/unsubscribe-from-a-channel).
+{!depends-on-permissions.md!}
 
 {start_tabs}
 
@@ -18,6 +15,8 @@ channel](/help/unsubscribe-from-a-channel).
 
 1. Click the **Unsubscribe** (<i class="zulip-icon zulip-icon-close"></i>) icon in that row.
 
+{!channel-menu-subscribers-tab-tip.md!}
+
 {tab|via-user-profile}
 
 {!right-sidebar-view-profile.md!}

help/manage-user-channel-subscriptions.md

@@ -19,7 +19,7 @@
 
 {!subscribe-user-to-channel.md!}
 
-## Unsubscribe a user from channel(s)
+## Unsubscribe a user from a channel
 
 {!unsubscribe-user-from-channel.md!}
 

help/unsubscribe-users-from-a-channel.md

@@ -6,42 +6,7 @@ configure who can
 [unsubscribe](/help/configure-who-can-unsubscribe-others) anyone
 from a particular channel.
 
-You will only see the options below if you have the required permissions.
-
-## Unsubscribe users from a channel
-
-{start_tabs}
-
-{tab|desktop-web}
-
-{relative|channel|all}
-
-1. Select a channel.
-
-{!select-channel-view-subscribers.md!}
-
-1. Under **Subscribers**, find the user you would like to unsubscribe.
-
-1. Click the **Unsubscribe** (<i class="zulip-icon zulip-icon-close"></i>) icon in that row.
-
-{!channel-menu-subscribers-tab-tip.md!}
-
-{tab|via-right-sidebar}
-
-{!right-sidebar-view-profile.md!}
-
-1. Select the **Channels** tab.
-
-1. Under **Subscribed channels**, find the channel you would like
-   to unsubscribe the user from.
-
-1. Click the **Unsubscribe** (<i class="zulip-icon zulip-icon-close"></i>) icon in that row.
-
-!!! tip ""
-
-    This method is useful if you need to unsubscribe one user from multiple channels.
-
-{end_tabs}
+{!unsubscribe-user-from-channel.md!}
 
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