This is a simple utility to remove all .svn folders recursively.
svnRemover
Use it at your own risk!
Source code:
FileSelectFolder, folder, %A_Desktop%
Loop, %folder%\*.*, 2, 1
{
FileFullPath := A_LoopFileLongPath
IfInString, FileFullPath, .svn
FileRemoveDir, %FileFullPath%, 1
}