DOCSP-23134 shorten mongosh method admonition (#1209)

* shorten mongosh method admonition

* tweaks

* wording

* wording

Author: jeff-allen-mongo

source/includes/fact-mongosh-shell-method.rst

@@ -1,19 +1,13 @@
 .. important:: ``mongosh`` Method
 
-   This is a :binary:`~bin.mongosh` method. This is *not* the
-   documentation for ``Node.js`` or other programming language specific
-   driver methods.
+   This page documents a :binary:`~bin.mongosh` method. This is *not*
+   the documentation for a language-specific driver such as Node.js.
 
-   In most cases, :binary:`~bin.mongosh` methods work the same way as
-   the legacy :binary:`~bin.mongo` shell methods. However, some legacy
-   methods are unavailable in ``mongosh``.
+   For MongoDB API drivers, refer to the language-specific
+   :driver:`MongoDB driver documentation </>`.
 
-   For the legacy :binary:`~bin.mongo` shell documentation, refer to the
+   For the legacy ``mongo`` shell documentation, refer to the
    documentation for the corresponding MongoDB Server release:
 
    - :v4.4:`mongo shell v4.4 </mongo>`
    - :v4.2:`mongo shell v4.2 </mongo>`
-   - :v4.0:`mongo shell v4.0 </mongo>`
-
-   For MongoDB API drivers, refer to the language specific
-   :driver:`MongoDB driver </>` documentation.