Revert "Don't actually execute the target at the moment"

This reverts commit 713da63.

Author: rockbruno

modules/sourcekit_bazel_bsp/0.2.0/presubmit.yml

@@ -10,7 +10,5 @@ tasks:
     name: Verify build targets
     platform: ${{ platform }}
     bazel: ${{ bazel }}
-    build_flags:
-      - "--nobuild" # Remove this once the CI supports Xcode 26
     build_targets:
     - '@sourcekit_bazel_bsp//Sources:sourcekit-bazel-bsp'