Remove sidebars/menus from Manage pages

Remove sidebars and menus from Manage-related doc pages.

doc/user/admin_area/analytics/usage_trends.md

@@ -39,4 +39,4 @@ in the categories shown in [Total counts](#total-counts).
 
 These charts help you visualize how rapidly these records are being created on your instance.
 
-![Instance Activity Pipelines chart](img/instance_activity_pipelines_chart_v13_6.png)
+![Instance Activity Pipelines chart](img/instance_activity_pipelines_chart_v13_6_a.png)

doc/user/group/issues_analytics/index.md

@@ -31,7 +31,7 @@ You can change the total number of months displayed by setting a URL parameter.
 For example, `https://gitlab.com/groups/gitlab-org/-/issues_analytics?months_back=15`
 shows a total of 15 months for the chart in the GitLab.org group.
 
-![Issues created per month](img/issues_created_per_month_v12_8.png)
+![Issues created per month](img/issues_created_per_month_v12_8_a.png)
 
 ## Drill into the information
 

doc/user/group/saml_sso/index.md

@@ -322,11 +322,9 @@ Ensure your SAML identity provider sends an attribute statement named `Groups` o
 ```
 
 When SAML SSO is enabled for the top-level group, `Maintainer` and `Owner` level users
-see a new menu item in group **Settings -> SAML Group Links**. Each group (parent or subgroup) can specify
+see a new menu item in group **Settings > SAML Group Links**. Each group (parent or subgroup) can specify
 one or more group links to map a SAML identity provider group name to a GitLab access level.
 
-![SAML Group Links navigation](img/saml_group_links_nav_v13_6.png)
-
 To link the SAML `Freelancers` group in the attribute statement example above:
 
 1. Enter `Freelancers` in the `SAML Group Name` field.

doc/user/group/value_stream_analytics/index.md

@@ -343,8 +343,6 @@ To create a value stream with stages:
      ![Custom stage actions](img/vsa_custom_stage_v13_10.png "Custom stage actions")
 1. Select the **Create Value Stream** button to save the value stream.
 
-![Extended create value stream form](img/extended_value_stream_form_v13_10.png "Extended create value stream form")
-
 ### Deleting a value stream
 
 > [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/221205) in GitLab 13.4.