find . "-name" ".DS_Store" -exec rm {} \;
Thank you Alec Jacobson, who said:
“This is posted all over the web, but sanity’s sake I’ll post it again here. This use of the unix command line program find will locate and remove all the .DS_Store files that Finder populates throughout your directories. The
removes all files by the name .DS_Store in the current directory recursively."