Remove build step for python-ros2-dataflow example

The build step now requires a coordinator connection.

examples/python-ros2-dataflow/run.rs

@@ -40,15 +40,6 @@ async fn main() -> eyre::Result<()> {
 async fn run_dataflow(dataflow: &Path) -> eyre::Result<()> {
     let cargo = std::env::var("CARGO").unwrap();
 
-    // First build the dataflow (install requirements)
-    let mut cmd = tokio::process::Command::new(&cargo);
-    cmd.arg("run");
-    cmd.arg("--package").arg("dora-cli");
-    cmd.arg("--").arg("build").arg(dataflow).arg("--uv");
-    if !cmd.status().await?.success() {
-        bail!("failed to run dataflow");
-    };
-
     let mut cmd = tokio::process::Command::new(&cargo);
     cmd.arg("run");
     cmd.arg("--package").arg("dora-cli");