Update docs/toolhive/tutorials/custom-registry.mdx

Co-authored-by: Dan Barr <[email protected]>

Author: rdimitrov

docs/toolhive/tutorials/custom-registry.mdx

@@ -131,9 +131,6 @@ Your server configurations include everything ToolHive needs to run them:
 - Command-line arguments for customization
 - Network permissions for security
 
-Groups provide an organizational layer that allows you to run multiple related
-servers together as a cohesive unit.
-
 ### Step 2: Configure ToolHive to use your registry
 
 Configure ToolHive to use your custom registry.