[Benchmark tools] Deprecate all (#15848)

* [Benchmark tools] Deprecate all

* up

docs/source/benchmarks.mdx

@@ -12,6 +12,13 @@ specific language governing permissions and limitations under the License.
 
 # Benchmarks
 
+<Tip warning={true}>
+
+Hugging Face's Benchmarking tools are deprecated and it is advised to use external Benchmarking libraries to measure the speed 
+and memory complexity of Transformer models.
+
+</Tip>
+
 [[open-in-colab]]
 
 Let's take a look at how 🤗 Transformers models can be benchmarked, best practices, and already available benchmarks.