Remove more legacy commands

Author: sailro

.yamato/CI.yml

@@ -129,11 +129,6 @@ run_feature_test_project_{{ platform.name }}_{{ editor.version }}:
     DISPLAY: ":0"
   {% endif %}
   commands:
-{% if platform.name == "linux" -%}
-    - pip install unity-downloader-cli --index-url https://artifactory.prd.it.unity3d.com/artifactory/api/pypi/pypi/simple --upgrade --user
-{% else -%}
-    - pip install unity-downloader-cli --index-url https://artifactory.prd.it.unity3d.com/artifactory/api/pypi/pypi/simple --upgrade
-{% endif -%}
     - {{ platform.envsetup }}
     - unity-downloader-cli -u {{editor.version}} -c editor -c linux -c macos -c windows --fast --wait --published-only
     - npm install upm-ci-utils@latest -g --registry https://artifactory.prd.cds.internal.unity3d.com/artifactory/api/npm/upm-npm