Remove menu/sidebars from Admin images

doc/user/admin_area/appearance.md

@@ -16,9 +16,7 @@ section.
 
 By default, the navigation bar has the GitLab logo, but this can be customized with
 any image desired. It is optimized for images 28px high (any width), but any image can be
-used (less than 1MB) and it is automatically resized.
-
-![Navigation bar header logo screenshot](img/appearance_header_logo_v12_3.png)
+used (less than 1 MB) and it is automatically resized.
 
 After you select and upload an image, click **Update appearance settings** at the bottom
 of the page to activate it in the GitLab instance.
@@ -34,8 +32,6 @@ By default, the favicon (used by the browser as the tab icon, as well as the CI
 uses the GitLab logo, but this can be customized with any icon desired. It must be a
 32x32 `.png` or `.ico` image.
 
-![favicon screenshot](img/appearance_favicon_v12_3.png)
-
 After you select and upload an icon, click **Update appearance settings** at the bottom
 of the page to activate it in the GitLab instance.
 
@@ -52,8 +48,6 @@ Limited [Markdown](../markdown.md) is supported, such as bold, italics, and link
 example. Other Markdown features, including lists, images, and quotes are not supported
 as the header and footer messages can only be a single line.
 
-![header and footer screenshot](img/appearance_header_footer_v12_3.png)
-
 If desired, you can select **Enable header and footer in emails** to have the text of
 the header and footer added to all emails sent by the GitLab instance.
 
@@ -63,16 +57,12 @@ to activate it in the GitLab instance.
 ## Sign in / Sign up pages
 
 You can replace the default message on the sign in / sign up page with your own message
-and logo. You can make full use of [Markdown](../markdown.md) in the description:
-
-![sign in message screenshot](img/appearance_sign_in_v12_3.png)
+and logo. You can make full use of [Markdown](../markdown.md) in the description.
 
 The optimal size for the logo is 640x360px, but any image can be used (below 1MB)
 and it is resized automatically. The logo image appears between the title and
 the description, on the left of the sign-up page.
 
-![sign in message preview screenshot](img/appearance_sign_in_preview_v12_3.png)
-
 After you add a message, click **Update appearance settings** at the bottom of the page
 to activate it in the GitLab instance. You can also click on the **Sign-in page** button,
 to review the saved appearance settings:
@@ -85,8 +75,6 @@ You can add also add a [customized help message](settings/help_page.md) below th
 You can add a new project guidelines message to the **New project page** within GitLab.
 You can make full use of [Markdown](../markdown.md) in the description:
 
-![new project message screenshot](img/appearance_new_project_v12_3.png)
-
 The message is displayed below the **New Project** message, on the left side
 of the **New project page**.
 
@@ -94,8 +82,6 @@ After you add a message, click **Update appearance settings** at the bottom of t
 to activate it in the GitLab instance. You can also click on the **New project page**
 button, which brings you to the new project page so you can review the change.
 
-![new project message preview screenshot](img/appearance_new_project_preview_v12_3.png)
-
 ## Libravatar
 
 [Libravatar](https://www.libravatar.org) is supported by GitLab for avatar images, but you must

doc/user/admin_area/settings/help_page.md

@@ -18,13 +18,8 @@ You can add a help message, which is shown on the GitLab `/help` page (e.g.,
 
 1. Navigate to **Admin Area > Settings > Preferences**, then expand **Help page**.
 1. Under **Help page text**, fill in the information you wish to display on `/help`.
-
-   ![help page help message](img/help_page_help_page_text_v12_3.png)
-
 1. Save your changes. You can now see the message on `/help`.
 
-![help message on help page example](img/help_page_help_page_text_ex_v12_3.png)
-
 ## Adding a help message to the login page **(STARTER)**
 
 You can add a help message, which is shown on the GitLab login page in a new section

doc/user/admin_area/user_cohorts.md

@@ -15,7 +15,7 @@ To see user cohorts, go to **Admin Area > Overview > Users**.
 How do you interpret the user cohorts table? Let's review an example with the
 following user cohorts:
 
-![User cohort example](img/cohorts_v13_9.png)
+![User cohort example](img/cohorts_v13_9_a.png)
 
 For the cohort of March 2020, three users were added to this server and have
 been active since this month. One month later (April 2020), two users are still