Remove (unnecessary) local prototype for G_clicker()

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@34459 15284696-431f-4ddb-bdfa-cd5b030d7da7

vector/v.perturb/zufall.h

@@ -26,9 +26,6 @@ struct klotz1
     int first, xptr;
 };
 
-/* clicker.c */
-int G_clicker(void);
-
 /* fische.c */
 int fische(int, double *, int *);