svn propdel — Remove a property from an item.
svn propdel PROPNAME [PATH...]
svn propdel PROPNAME --revprop -r REV [URL]
This removes properties from files, directories, or revisions. The first form removes versioned properties in working copy, while the second removes unversioned remote properties on a repository revision.
pdel
Working copy, repository only if operating on a URL
Only if operating on a URL
--quiet (-q) --recursive (-R) --revision (-r) REV --revprop
Delete a property from a file in your working copy
$ svn propdel svn:mime-type some-script property `svn:mime-type' deleted from 'some-script'.
Delete a revision property:
$ svn propdel --revprop -r 26 release-date property `release-date' deleted from repository revision '26'