how to delete sims mod file

@SantaFeAtBay You can delete the mods fully by opening your Sims 4 folder in My Documents and in the mod folder delete all mods, in your case you can just delete the entire folder. 

You will then need to clear the Sims 4 cache which you can do by deleting the file localthumbscache.package which is the folder in which your Documents/Electronic Arts/The Sims 4/ cache can be found.

You also need to delete all files that end in .cache but leave the actual directory. 

Now go ahead and go back  to the cachestr folder. Delete all of the files but once again do not delete the actual directory.

If you see a folder called onlinethumbnailcache then you can go ahead and trash it too.