Note that this change gives a warning.

Author: philderbeast

changelog.d/pr-9933

@@ -1,15 +1,12 @@
 synopsis: Detect non-cyclical duplicate project imports
 description:
   Detect and report on duplicate imports that are non-cyclical. Give more detail
-  when reporting cyclical imports. Be more explicit and consistent with
-  non-cyclical duplicate reporting.
+  when reporting duplicate imports.
 
   ```
   $ cabal build --project-file=cabal.project
   ...
-  Error: [Cabal-7090]
-  Error parsing project file cabal.project:
-  duplicate import of config/config-3.config;
+  Warning: 2 imports of config/config-3.config;
     config/config-3.config
       imported by: cabal.project
     config/config-3.config