fix pytest in ci

Author: hychiang-git

.github/workflows/quamba-ci.yml

@@ -52,7 +52,6 @@ jobs:
         python --version
         python -m venv venv
         source venv/bin/activate
-        pip install -r requirements.txt
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
@@ -63,8 +62,8 @@ jobs:
     #     flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
     #     # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
     #     flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
-     # Not sure why Megatron-LM will force to install pytorch 2.6.0 and cuda libs
-     # , so we install Megatron-LM first then do `pip install -r requirements.txt` again here...
+     # Not sure why Megatron-LM will force to install pytorch 2.6.0 and cuda libs,
+     # so we install Megatron-LM first then do `pip install -r requirements.txt` again here...
     - name: Build 3rdparty dependencies
       run: |
         pip install -e 3rdparty/Megatron-LM