Clean up about.md by removing unnecessary content

Removed redundant section about documentation and sponsorship.

Author: oblomov-dev

docs/get_started/about.md

@@ -118,7 +118,3 @@ Contributions are always welcome. Whether you fix bugs, build features, or impro
 Volunteers maintain abap2UI5. If you or your company benefits from the project, please consider sponsoring it.
 
 → *Read more about [sponsorship opportunities](/resources/sponsor)*
-
-### About This Documentation
-
-This site explains the mental model, lifecycle, and recurring patterns of abap2UI5 — the *how* and *why* behind the framework. For the API surface (interfaces like `z2ui5_if_client`, helpers like `z2ui5_cl_xml_view`), read the source directly in the [main repository](https://github.com/abap2UI5/abap2UI5). For ready-to-copy code, browse the 250+ apps in the [samples repository](https://github.com/abap2UI5/samples). Treat this site as the index, not the catalog.