[Misc] Minor fixes in requirements.txt (#3769)

requirements-rocm.txt

@@ -15,3 +15,4 @@ uvicorn[standard]
 pydantic >= 2.0  # Required for OpenAI server.
 prometheus_client >= 0.18.0
 outlines == 0.0.34
+tiktoken == 0.6.0 # Required for DBRX tokenizer

requirements.txt

@@ -6,7 +6,6 @@ sentencepiece  # Required for LLaMA tokenizer.
 numpy
 torch == 2.1.2
 requests
-psutil
 py-cpuinfo
 transformers >= 4.39.1  # Required for StarCoder2 & Llava.
 xformers == 0.0.23.post1  # Required for CUDA 12.1.