Removed some unused functions

hpvm/projects/hpvm-tensor-rt/CMakeLists.txt

...rojects/hpvm-tensor-rt/dnn_sources/include/op_overheads.h

hpvm/projects/hpvm-tensor-rt/dnn_sources/include/types.h

hpvm/projects/hpvm-tensor-rt/dnn_sources/include/utils.h

hpvm/projects/hpvm-tensor-rt/dnn_sources/include/utils_cpu.h

...m-tensor-rt/dnn_sources/src/fp16/alexnet2_cifar10_half.cc

...vm-tensor-rt/dnn_sources/src/fp16/alexnet_cifar10_half.cc

...s/hpvm-tensor-rt/dnn_sources/src/fp16/lenet_mnist_half.cc

...cts/hpvm-tensor-rt/dnn_sources/src/fp16/mobilenet_half.cc

...m-tensor-rt/dnn_sources/src/fp16/resnet18_cifar10_half.cc

...pvm-tensor-rt/dnn_sources/src/fp16/vgg16_cifar100_half.cc

...hpvm-tensor-rt/dnn_sources/src/fp16/vgg16_cifar10_half.cc

...s/hpvm-tensor-rt/dnn_sources/src/fp32/alexnet2_cifar10.cc

...ts/hpvm-tensor-rt/dnn_sources/src/fp32/alexnet_cifar10.cc

...s/hpvm-tensor-rt/dnn_sources/src/fp32/alexnet_imagenet.cc

...ojects/hpvm-tensor-rt/dnn_sources/src/fp32/lenet_mnist.cc

...projects/hpvm-tensor-rt/dnn_sources/src/fp32/mobilenet.cc

...s/hpvm-tensor-rt/dnn_sources/src/fp32/resnet18_cifar10.cc

.../hpvm-tensor-rt/dnn_sources/src/fp32/resnet50_imagenet.cc

...ects/hpvm-tensor-rt/dnn_sources/src/fp32/vgg16_cifar10.cc