Update _integration_test.yml

Author: haiyang679

.github/workflows/_integration_test.yml

@@ -10,7 +10,6 @@ on:
         description: "From which folder this pipeline executes"
 
 env:
-  PYTHON_VERSION: "3.9"
   POETRY_VERSION: "1.7.1"
 
 jobs:
@@ -25,7 +24,6 @@ jobs:
     strategy:
       matrix:
         python-version:
-          - "3.8"
           - "3.9"
           - "3.10"
           - "3.11"