Revert "MTA-3245: Document disconnected MTA CLI installation"

Author: anarnold97

docs/cli-guide/master.adoc

@@ -40,8 +40,6 @@ include::topics/about-cli.adoc[leveloffset=+2]
 // Install the CLI
 include::topics/installing-cli-tool.adoc[leveloffset=+2]
 
-include::topics/installing-cli-tool-disconnected.adoc[leveloffset=+2]
-
 // CLI known issues
 include::topics/cli-tool-known-issues.adoc[leveloffset=+3]