docs: remove redundant sf-web-open example 4

- Removed duplicate 'custom path' example from both bash and PowerShell scripts
- Example 2 already demonstrates custom path usage with Setup Home
- Updated README.md to match the streamlined 3-example format
- All examples now provide distinct, non-overlapping use cases

sf-web-open.ps1

@@ -28,9 +28,6 @@ EXAMPLES:
 
   3) Get just the URL for scripting:
      sf-web-open.ps1 -to "NUSHUB-DR2" -ur
-
-  4) Open org with custom path:
-     sf-web-open.ps1 -to "MYORG" -pt "/lightning/setup/ObjectManager/home"
 "@
 }