Renaming size() to numel()

Summary:
Codemod generated with clangr shard mode, 50 files per diff,
clangr code(size->numel): diffusion/FBS/browse/master/fbcode/caffe2/caffe2/fb/codemods/TensorMethodRename.cpp

Reviewed By: ezyang

Differential Revision: D12833487

fbshipit-source-id: 5dec5a64f91912620f3a5e48a2cc571be675c5fd

detectron/ops/zero_even_op.cc

@@ -30,7 +30,7 @@ bool ZeroEvenOp<float, CPUContext>::RunOnDevice() {
 
   // Set output elements at even indices to zero.
   auto* Y_data = Y->mutable_data<float>();
-  for (auto i = 0; i < Y->size(); i += 2) {
+  for (auto i = 0; i < Y->numel(); i += 2) {
     Y_data[i] = 0.0f;
   }