docs: move Mobile Start link to its own page

Remove the Mobile Start LinkedIn link from Build Work Zone so it lives
only on the dedicated Mobile Start page.

Author: claude

docs/configuration/btp.md

@@ -6,7 +6,6 @@ outline: [2, 4]
 Embed your abap2UI5 apps into BTP services like SAP Build Work Zone. Full details:<br>
 [**Installation & Configuration of BTP**](https://www.linkedin.com/pulse/abap2ui5-integration-sap-business-technology-platform-13-installation-lf1re/?trackingId=YQ0y%2Fq0y6Kw5PK8chNCbrw%3D%3D&lipi=urn%3Ali%3Apage%3Ad_flagship3_pulse_read%3BFGBWUSIZRzeRjUNKBFD0uA%3D%3D)<br>
 [**Setup SAP Build Work Zone**](https://www.linkedin.com/pulse/abap2ui5-integration-sap-business-technology-platform-23-setup-ujdqe/?trackingId=vFwHvpI9oBk2igiz5P5CWA%3D%3D&lipi=urn%3Ali%3Apage%3Ad_flagship3_pulse_read%3BFGBWUSIZRzeRjUNKBFD0uA%3D%3D)<br>
-[**Setup SAP Mobile Start**](https://www.linkedin.com/pulse/abap2ui5-integration-sap-business-technology-platform-33-setup-uzure/?trackingId=He2W8FnZZ5UxpbGKHOeLEg%3D%3D&lipi=urn%3Ali%3Apage%3Ad_flagship3_pulse_read%3BFGBWUSIZRzeRjUNKBFD0uA%3D%3D)<br>
 
 ### Configuration
 <br>