[CB] Remove OpenTelemetry (huggingface#45984)

Remove opentelemetry

Author: remi-or

docs/source/en/serve-cli/serving_optims.md

@@ -29,14 +29,6 @@ transformers serve \
   --attn-implementation "sdpa"
 ```
 
-Monitor continuous batching performance with [OpenTelemetry](https://opentelemetry.io). It collects traces and metrics, but you'll need a backend to visualize them.
-
-Install the OpenTelemetry dependency.
-
-```py
-pip install transformers[open-telemetry]
-```
-
 ## Quantization
 
 [Quantization](../quantization/overview) reduces memory usage by mapping weights to a lower precision. `transformers serve` is compatible with all quantization methods in Transformers. It supports pre-quantized models and runtime quantization.
@@ -90,4 +82,4 @@ The `"bfloat16"` or `"float16"` [data types](../models#model-data-type) save mem
 transformers serve \
   --continuous-batching \
   --dtype "bfloat16"
-```
+```