[Eager] sync_batch_norm_grad delete mean and variance (#45411)

* sync_batch_norm_grad delete mean and variance

paddle/phi/api/yaml/legacy_backward.yaml

@@ -2460,7 +2460,7 @@
 
 - backward_api : sync_batch_norm_grad
   forward : sync_batch_norm_ (Tensor x, Tensor scale, Tensor bias, Tensor mean, Tensor variance, float momentum, float epsilon, str data_layout, bool is_test, bool use_global_stats, bool trainable_statistics, bool fuse_with_relu) -> Tensor(out), Tensor(mean_out), Tensor(variance_out), Tensor(saved_mean), Tensor(saved_variance), Tensor(reserve_space)
-  args : (Tensor x, Tensor scale, Tensor bias, Tensor mean_out, Tensor variance_out, Tensor saved_mean, Tensor saved_variance, Tensor reserve_space, Tensor out_grad, float momentum, float epsilon, str data_layout, bool is_test, bool use_global_stats, bool trainable_statistics, bool fuse_with_relu)
+  args : (Tensor x, Tensor scale, Tensor bias, Tensor saved_mean, Tensor saved_variance, Tensor reserve_space, Tensor out_grad, float momentum, float epsilon, str data_layout, bool is_test, bool use_global_stats, bool trainable_statistics, bool fuse_with_relu)
   output : Tensor(x_grad), Tensor(scale_grad), Tensor(bias_grad)
   infer_meta :
     func : GeneralTernaryGradInferMeta
@@ -2468,7 +2468,7 @@
   kernel :
     func : sync_batch_norm_grad
     data_type : out_grad
-  optional : mean_out, variance_out, reserve_space
+  optional : reserve_space
 
 - backward_api : take_along_axis_grad
   forward : take_along_axis (Tensor x, Tensor index, int axis) -> Tensor(out)

paddle/phi/kernels/gpu/sync_batch_norm_grad_kernel.cu

@@ -24,8 +24,6 @@ void SyncBatchNormGradKernel(const Context& ctx,
                              const DenseTensor& x,
                              const DenseTensor& scale,
                              const DenseTensor& bias,
-                             const paddle::optional<DenseTensor>& mean,
-                             const paddle::optional<DenseTensor>& variance,
                              const DenseTensor& saved_mean,
                              const DenseTensor& saved_variance,
                              const paddle::optional<DenseTensor>& reserve_space,

paddle/phi/kernels/sync_batch_norm_grad_kernel.h

@@ -25,8 +25,6 @@ void SyncBatchNormGradKernel(const Context& dev_ctx,
                              const DenseTensor& x,
                              const DenseTensor& scale,
                              const DenseTensor& bias,
-                             const paddle::optional<DenseTensor>& mean,
-                             const paddle::optional<DenseTensor>& variance,
                              const DenseTensor& saved_mean,
                              const DenseTensor& saved_variance,
                              const paddle::optional<DenseTensor>& reserve_space,

paddle/phi/ops/compat/sync_batch_norm_sig.cc

@@ -42,8 +42,6 @@ KernelSignature SyncBatchNormGradOpArgumentMapping(
                              "X",
                              "Scale",
                              "Bias",
-                             "Mean",
-                             "Variance",
                              "SavedMean",
                              "SavedVariance",
                              "ReserveSpace",