remove specific index-url for torch installation to avoid conflict

Signed-off-by: Sun, Xuehao <xuehao.sun@intel.com>

Author: XuehaoSun

.azure-pipelines/scripts/install_nc.sh

@@ -9,7 +9,7 @@ if [[ $1 = *"3x_pt"* ]]; then
         python setup.py pt bdist_wheel
     else
         echo -e "\n Install torch CPU ... "
-        pip install torch==2.5.1 --index-url https://download.pytorch.org/whl/cpu
+        pip install torch==2.5.1
         python -m pip install intel-extension-for-pytorch==2.5.0 oneccl_bind_pt==2.5.0 --extra-index-url https://pytorch-extension.intel.com/release-whl/stable/cpu/us/
         python -m pip install --no-cache-dir -r requirements.txt
         python setup.py bdist_wheel