2016-10-15, 17:00
I suppose you've got a few options, in increasing levels of difficulty:
1) Deleting the folders should work (unless they keep coming back in which case find the source and throw it from a tall building)
2) Set the content type for these folders to "None" so that they're not included in the scan
3) Create ".nomedia" files in the root of each folder, so that the scanner ignore the folders
4) Add exclude patterns to advancedsettings.xml
1) Deleting the folders should work (unless they keep coming back in which case find the source and throw it from a tall building)
2) Set the content type for these folders to "None" so that they're not included in the scan
3) Create ".nomedia" files in the root of each folder, so that the scanner ignore the folders
4) Add exclude patterns to advancedsettings.xml