remove cuda_timer as is no longer needed

include/caffe/util/cuda_timer.hpp

@@ -1,44 +0,0 @@
-#ifndef CAFFE_CUDA_TIMER_HPP_
-#define CAFFE_CUDA_TIMER_HPP_
-
-#include "caffe/common.hpp"
-
-namespace caffe {
-
-class CudaTimer {
-
-protected:
-  cudaEvent_t start;
-  cudaEvent_t stop;
-  bool on;
-
-public:
-  CudaTimer() : on(false) {
-    CUDA_CHECK(cudaEventCreate(&start));
-    CUDA_CHECK(cudaEventCreate(&stop));
-  }
-  ~CudaTimer() {
-    CUDA_CHECK(cudaEventDestroy(start));
-    CUDA_CHECK(cudaEventDestroy(stop));
-  }
-
-  void Tic() {
-    CUDA_CHECK(cudaEventRecord(start, 0));
-    on = true;
-  }
-
-  float Toc() {
-    float time;
-    CHECK(on) << "Tic before Toc";
-    CUDA_CHECK(cudaEventRecord(stop, 0));
-    CUDA_CHECK(cudaEventSynchronize(start));
-    CUDA_CHECK(cudaEventSynchronize(stop));
-    CUDA_CHECK(cudaEventElapsedTime(&time, start, stop));
-    on = false;
-    return time;
-  }
-};
-
-}  // namespace caffe
-
-#endif // CAFFE_CUDA_TIMER_HPP_