Update AWQ and GPTQ GPU example (#12300)

Author: lzivan

python/llm/example/GPU/HuggingFace/Advanced-Quantizations/AWQ/README.md

@@ -37,15 +37,10 @@ conda create -n llm python=3.11
 conda activate llm
 # below command will install intel_extension_for_pytorch==2.1.10+xpu as default
 pip install --pre --upgrade ipex-llm[xpu] --extra-index-url https://pytorch-extension.intel.com/release-whl/stable/xpu/us/
-pip install transformers==4.35.0
 pip install autoawq==0.1.8 --no-deps
 pip install accelerate==0.25.0
 pip install einops
 ```
-**Note: For Mixtral model, please use transformers 4.36.0:**
-```bash
-pip install transformers==4.36.0
-```
 
 ### 2. Configures OneAPI environment variables
 

python/llm/example/GPU/HuggingFace/Advanced-Quantizations/GPTQ/README.md

@@ -13,7 +13,6 @@ conda create -n llm python=3.11
 conda activate llm
 # below command will install intel_extension_for_pytorch==2.1.10+xpu as default
 pip install --pre --upgrade ipex-llm[xpu] --extra-index-url https://pytorch-extension.intel.com/release-whl/stable/xpu/us/
-pip install transformers==4.37.0
 pip install auto_gptq==0.7.1
 pip install optimum==1.14.0
 ```