Update .github/workflows/presubmit-tests.yml

Co-authored-by: Yuan Teoh <45984206+Yuan325@users.noreply.github.com>

Author: averikitsch

.github/workflows/presubmit-tests.yml

@@ -37,8 +37,3 @@ jobs:
         run: npx gemini extensions validate .
         env:
           GEMINI_API_KEY: "placeholder"
-=======
-        env:
-          GEMINI_API_KEY: "placeholder"
-        run: yes | npx gemini extensions install .
->>>>>>> main