find . -type f -name "*.migrated.dll" 
find . -type f -name "*.dll.json" 

find . -type f -name "*.migrated.dll" -exec rm -fr {} \;
find . -type f -name "*.dll.json" -exec rm -f {} \;

find . -type f -name "*.migrated.dll" 
find . -type f -name "*.dll.json"