cleanup formation central example

Author: rubenvanparys

examples/formation_holonomic_central.py

@@ -16,8 +16,7 @@
 # You should have received a copy of the GNU Lesser General Public
 # License along with this program; if not, write to the Free Software
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
-import sys, os
-sys.path.insert(0, os.getcwd()+'/..')
+
 from omgtools import *
 from casadi import inf