CI: Fix docs publishing

There's no more a need to fix up the docs structure, when build_docs already produces the correct directory structure.

.github/workflows/nightly_snapshot.yaml

@@ -439,7 +439,7 @@ jobs:
                 else
                   version="development snapshot"
                 fi
-                sed -i "s/VERSION/$version/g" ../docs/slint/index.html
+                sed -i "s/VERSION/$version/g" ../docs/index.html
 
                 rm -rf $output_path/docs
                 mv ../docs .
@@ -447,13 +447,6 @@ jobs:
                 # Fix up link to Slint language documentation
                 sed -i "s!https://slint.dev/releases/.*/docs/!../../!" $output_path/docs/rust/slint/*.html
 
-                mkdir -p $output_path/docs/node
-                cp -a ../api/node/docs/* $output_path/docs/node/
-                mkdir -p $output_path/docs/python
-                cp -a ../api/python/slint/docs/* $output_path/docs/python/
-                mkdir -p $output_path/docs/slint
-                cp -a ../docs/astro/dist/* $output_path/docs/slint/
-
             - name: Adjust redirections
               if: github.event.inputs.release == 'true'
               run: |