Cassandra: Remove build step

This step does not bring us any benefit. It also makes the CI run longer,
because the project has to be recompiled in the next step anyway,
because it has different RUSTFLAGS.

Instead of changing the RUSTFLAGS in the build step (and risking similar
problems in the future), let's remove it.

Author: Lorak-mmk

.github/workflows/cassandra.yml

@@ -26,8 +26,6 @@ jobs:
       # A separate step for building to separate measuring time of compilation and testing
     - name: Update rust toolchain
       run: rustup update
-    - name: Build the project
-      run: cargo build --tests --features "full-serialization"
     - name: Run tests on cassandra
       run: |
         CDC='disabled' RUSTFLAGS="--cfg cassandra_tests" RUST_LOG=trace SCYLLA_URI=172.42.0.2:9042 SCYLLA_URI2=172.42.0.3:9042 SCYLLA_URI3=172.42.0.4:9042 cargo test --features "full-serialization" -- --skip test_views_in_schema_info --skip test_large_batch_statements