simplify CI dependencies setup

Author: bygu4

.github/workflows/ci_extra.yml

@@ -23,8 +23,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        python -m pip install pytest
-        if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+        pip install -r requirements.txt
 
     - name: Lint with pylint
       run: |

.github/workflows/ci_feature.yml

@@ -27,8 +27,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        python -m pip install pytest
-        if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+        pip install -r requirements.txt
 
     - name: Lint with pylint
       run: |

.github/workflows/ci_master.yml

@@ -26,8 +26,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        python -m pip install pytest
-        if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+        pip install -r requirements.txt
 
     - name: Lint with pylint
       run: |