svn: remove the default -m commit arg

This should force people to add a valid commit message
when updating PKGBUILDs and the like. Passing it on the
command line still works fine

Signed-off-by: Aaron Griffin <aaronmgriffin@gmail.com>

commitpkg

@@ -98,7 +98,7 @@ if [ "$1" != "" ]; then
     echo "===> Commited with \"upgpkg: $pkgname $pkgver-$pkgrel
     $1\" message"
 else
-    svn commit -m "upgpkg: $pkgname $pkgver-$pkgrel" > /dev/null
+    svn commit >/dev/null
     if [ $? -ne 0 ]; then
         echo "Cancelled"
         exit 1