remove old core146 openvpn symlink that break build.

Signed-off-by: Arne Fitzenreiter <arne_f@ipfire.org>

diff --git a/config/rootfiles/core/146/filelists/openvpn b/config/rootfiles/core/146/filelists/openvpn
deleted file mode 120000 (symlink)
index 493f3f7..0000000
--- a/config/rootfiles/core/146/filelists/openvpn
+++ /dev/null
@@ -1 +0,0 @@
-../../../common/openvpn
\ No newline at end of file