I accidentally committed a whole bunch of binary files using TortoiseSVN's "Add folder" option when I should have used simply "Create folder". I do not want these binary files in SVN because they hog lots of space on my HD and don't really benefit from versioning anyway. However I'm unsure how best to go about reverting this mess in such a way that will actually free up the memory used committing all those binary files. I can easily delete all the files and commit, but I'm not confident this will actually remove their associated data from SVN, especially from the revision in which they were added.
I looked in the SVN repository dir and found a gigantic file "db/revs/67" which I assume represents data for revision 67 in which these files were added. Can I simply delete that file, or will it cause problems for SVN? It seems I would need to delete or modify files elsewhere so SVN acts as if those revisions never existed?