Doc: Remove include statements for screenshots not rendering properly (…

…#15981)

(cherry picked from commit cb45cd2)

docs/static/tab-widgets/install-agent.asciidoc

@@ -1,10 +1,5 @@
 // tag::fleet-managed[]
-. When the **Add Agent flyout** appears, stay on the **Enroll in fleet** tab
-+
---
-[role="screenshot"]
-image::../monitoring/images/integration-agent-add.png[Add agent flyout in {kib}]
---
+. When the **Add Agent flyout** appears, stay on the **Enroll in fleet** tab.
 . Skip the **Select enrollment token** step. The enrollment token you need is
 already selected.
 +
@@ -20,20 +15,11 @@ It takes about a minute for {agent} to enroll in {fleet}, download the
 configuration specified in the policy you just created, and start collecting
 data.
 
---
-[role="screenshot"]
-image::../monitoring/images/integration-agent-confirm.png[Agent confirm data]
---
 // end::fleet-managed[]
 
 // tag::standalone[]
-. When the **Add Agent flyout** appears, navigate to the **Run standalone** tab
-+
---
-[role="screenshot"]
-image::../monitoring/images/integration-agent-add-standalone.png[Add agent flyout in {kib}]
---
-. Configure the agent. Follow all the instructions in **Install Elastic Agent on your host**
+. When the **Add Agent flyout** appears, navigate to the **Run standalone** tab.
+. Configure the agent. Follow the instructions in **Install Elastic Agent on your host**.
 . After unpacking the binary, replace the `elastic-agent.yml` file with that supplied in the Add Agent flyout on the "Run standalone" tab, replacing the values of `ES_USERNAME` and `ES_PASSWORD` appropriately.
 . Run `sudo ./elastic-agent install`
 // end::standalone[]