Pass when exception is raised trying to set the transaction name (#722)

When Pyramid can't match the route request.matched_route is set to None. The patched call view is throwing an AttributeException trying to set the transaction name.

sentry_sdk/integrations/pyramid.py

@@ -81,7 +81,7 @@ def sentry_patched_call_view(registry, request, *args, **kwargs):
                         elif integration.transaction_style == "route_pattern":
                             scope.transaction = request.matched_route.pattern
                     except Exception:
-                        raise
+                        pass
 
                     scope.add_event_processor(
                         _make_event_processor(weakref.ref(request), integration)