Remove cudaSetDevice(1)

So it works when there is only one GPU

tools/dump_network.cpp

@@ -28,7 +28,6 @@
 using namespace caffe;  // NOLINT(build/namespaces)
 
 int main(int argc, char** argv) {
-  cudaSetDevice(1);
   Caffe::set_mode(Caffe::GPU);
   Caffe::set_phase(Caffe::TEST);