libtrellis: Fix deprecated copy compile warnings

Signed-off-by: David Shah <dave@ds0.me>

libtrellis/include/RoutingGraph.hpp

diff --git a/libtrellis/include/RoutingGraph.hpp b/libtrellis/include/RoutingGraph.hpp
index 9f41187..9561b6b 100644
--- a/libtrellis/include/RoutingGraph.hpp
+++ b/libtrellis/include/RoutingGraph.hpp
@@ -23,9 +23,6 @@
     Location(int16_t x, int16_t y) : x(x), y(y)
     {};
 
-    Location(const Location &loc) : x(loc.x), y(loc.y)
-    {};
-
     bool operator==(const Location &other) const
     { return x == other.x && y == other.y; }