How to remove svn needs-lock in all files in folders and subfolders

Use the check-for-modifications dialog, show all files (including not
modified ones).
Select all files, right-click, choose “properties”. Then remove the
svn:needs-lock property.

.svn-base 
entries

find ./ -iname 'foo' -or  -iname 'bar'
find ./ -type f -print | xargs sed -i 's/svn:needs-lock//g' {};