Remove initialized api from tensor

Summary: In aten tensor this is used to reason about if the Intrusive ptr to tensorImpl is set or not. We were using it to reason about the data ptr so I'd rather just delete it. If we need to reason about if the TensorImpl ptr in Tensor is null or not we can add it back with different semantics.

Reviewed By: larryliu0820

Differential Revision: D46129275

fbshipit-source-id: 0ea311b1e5b2ae6048eabe20dbc7afcd41c0fe7d

Author: JacobSzwejbka

core/kernel_types/lean/tensor.h

@@ -148,11 +148,6 @@ class Tensor {
     impl_->set_data(ptr);
   }
 
-  // To be removed in follow up
-  bool initialized() const {
-    return impl_->initialized();
-  }
-
  private:
   TensorImpl* impl_ = nullptr;
 };

core/kernel_types/lean/tensor_impl.cpp

@@ -172,9 +172,5 @@ Error TensorImpl::internal_resize_contiguous(ArrayRef<SizesType> new_sizes) {
   return Error::Ok;
 }
 
-bool TensorImpl::initialized() const {
-  return data_ != nullptr;
-}
-
 } // namespace executor
 } // namespace torch

core/kernel_types/lean/tensor_impl.h

@@ -177,9 +177,6 @@ class TensorImpl {
   /// Sets the underlying data blob to the passed in pointer.
   void set_data(void* ptr);
 
-  /// Returns true if the tensor data pointer is not null.
-  bool initialized() const;
-
   /*
    * DEPRECATED: Use torch::executor::resize_tensor() or
    * torch::executor::resize_tensor_impl().

util/util.h

@@ -85,7 +85,7 @@ inline exec_aten::ArrayRef<void*> PrepareInputTensors(
       continue;
     }
     const auto& t = plan.get_input(i).toTensor();
-    if (!t.initialized()) {
+    if (t.data_ptr() == nullptr) {
       ET_LOG(Info, "input not initialized.");
       inputs[num_allocated++] = malloc(t.nbytes());
       t.set_data(inputs[num_allocated - 1]);