Removed redundant installations in CI

Author: iluhinsky

.github/workflows/go.yml

@@ -106,14 +106,9 @@ jobs:
         # Install PostgreSQL client
         sudo apt-get update
         sudo apt-get install -y postgresql-client
-        
-        # Install Cassandra client and dependencies
-        sudo apt-get install -y curl python3-pip
-        curl -fsSL https://www.apache.org/dist/cassandra/KEYS | sudo gpg --dearmor -o /usr/share/keyrings/cassandra-archive-keyring.gpg
-        echo "deb [signed-by=/usr/share/keyrings/cassandra-archive-keyring.gpg] https://apache.jfrog.io/artifactory/cassandra-deb/ 40x main" | sudo tee -a /etc/apt/sources.list.d/cassandra.sources.list
-        sudo apt-get update
-        sudo apt-get install -y cassandra-tools
-        pip3 install six
+
+    - name: Create vector extension
+      run: PGPASSWORD=password psql -h localhost -U root -d perfkit_pg_vector_db_ci -c "CREATE EXTENSION vector;"
 
     - name: Create Cassandra keyspace
       run: |
@@ -131,9 +126,6 @@ jobs:
         docker exec ${{ job.services.cassandra.id }} cqlsh -u cassandra -p cassandra -e "CREATE KEYSPACE IF NOT EXISTS perfkit_db_ci WITH replication = {'class': 'SimpleStrategy', 'replication_factor': 1};"
         echo "Keyspace created"
 
-    - name: Create vector extension
-      run: PGPASSWORD=password psql -h localhost -U root -d perfkit_pg_vector_db_ci -c "CREATE EXTENSION vector;"
-
     - name: Test with Coverage
       run: |
         go test -v -coverprofile=benchmark_coverage.txt -covermode=atomic ./benchmark/...