AC_Fence: relax sys-status healthy reporting

libraries/AC_Fence/AC_Fence.cpp

@@ -452,30 +452,6 @@ bool AC_Fence::sys_status_failed() const
     if (get_breaches() != 0) {
         return true;
     }
-    if (_enabled_fences & AC_FENCE_TYPE_POLYGON) {
-        if (!_poly_loader.inclusion_boundary_available()) {
-            return true;
-        }
-    }
-    if (_enabled_fences & AC_FENCE_TYPE_CIRCLE) {
-        if (_circle_radius < 0) {
-            return true;
-        }
-    }
-    if (_enabled_fences & AC_FENCE_TYPE_ALT_MAX) {
-        if (_alt_max < 0.0f) {
-            return true;
-        }
-    }
-    if ((_enabled_fences & AC_FENCE_TYPE_CIRCLE) ||
-        (_enabled_fences & AC_FENCE_TYPE_POLYGON)) {
-        Vector2f position;
-        if (!AP::ahrs().get_relative_position_NE_home(position)) {
-            // both these fence types require position
-            return true;
-        }
-    }
-
     return false;
 }