Update custom-instructions.md

Author: mrubens

docs/features/custom-instructions.md

@@ -26,7 +26,7 @@ These instructions only apply within your current workspace, allowing you to cus
 
 #### Workspace-Wide Instructions
 
-Workspace-wide instructions can be defined in the Prompts tab or through a `.roorules` file in your workspace root.
+Workspace-wide instructions can be defined in a `.roorules` file in your workspace root.
 
 #### Mode-Specific Instructions
 
@@ -88,4 +88,4 @@ When working in team environments, placing `.roorules` files under version contr
 
 ## Combining with Custom Modes
 
-For advanced customization, combine with [Custom Modes](/features/custom-modes) to create specialized environments with specific tool access, file restrictions, and tailored instructions.
+For advanced customization, combine with [Custom Modes](/features/custom-modes) to create specialized environments with specific tool access, file restrictions, and tailored instructions.