Remove unnecessary deps for eigen_helpers.

This will unblock us from building against OSS TF, which does not expose eigen_helpers publicly.

PiperOrigin-RevId: 236729633

tensorflow/contrib/seq2seq/BUILD

@@ -74,9 +74,6 @@ tf_custom_op_library(
         "kernels/beam_search_ops_gpu.cu.cc",
         "kernels/beam_search_ops.h",
     ],
-    deps = [
-        "//tensorflow/core/kernels:eigen_helpers",
-    ],
 )
 
 tf_gen_op_wrapper_py(
@@ -96,7 +93,6 @@ tf_kernel_library(
     deps = [
         "//tensorflow/core:framework",
         "//tensorflow/core:lib",
-        "//tensorflow/core/kernels:eigen_helpers",
         "//third_party/eigen3",
     ],
 )

tensorflow/contrib/seq2seq/kernels/beam_search_ops.h

@@ -18,7 +18,6 @@ limitations under the License.
 
 #include "third_party/eigen3/unsupported/Eigen/CXX11/Tensor"
 #include "tensorflow/core/framework/tensor_types.h"
-#include "tensorflow/core/kernels/eigen_activations.h"
 #include "tensorflow/core/platform/types.h"
 
 namespace tensorflow {