Update build.yml

Delete old enumeration classes on rebuild

.github/workflows/build.yml

@@ -36,6 +36,7 @@ jobs:
         run: |
           rm -rf main/code/schemas/*
           rm -rf main/code/mixedtypes/*
+          rm -rf main/code/enumerations/*
           cp -R target/* main/code
           cp -R main/code/internal/resources/content_files/* main/code/
           cp -R main/code/internal/resources/readme_files/* main/code/