Remove useless dependency on linux formula

Closes: #19
Change-Id: Icff040a1198221cb6bfa4fddb4b76dd42ebc7590
diff --git a/debian/control b/debian/control
index d6faf77..f6faa8b 100644
--- a/debian/control
+++ b/debian/control
@@ -2,7 +2,7 @@
 Maintainer: Michael Kuty <michael.kuty@tcpcloud.eu>
 Section: admin
 Priority: optional
-Build-Depends: salt-master, python, python-yaml, debhelper (>= 9), salt-master, python, python-yaml, salt-formula-linux
+Build-Depends: salt-master, python, python-yaml, debhelper (>= 9), salt-master, python, python-yaml
 Standards-Version: 3.9.6
 Homepage: http://www.tcpcloud.eu
 Vcs-Browser: https://github.com/tcpcloud/salt-formula-docker