Install Rust before make jerboa (native-bundle needs cargo)

ober

365aaae881666c698e91dd62e3c566f57832d893

diff --git a/.builds/ci.yml b/.builds/ci.yml
index bdecef2..8e97723 100644
--- a/.builds/ci.yml
+++ b/.builds/ci.yml
@@ -29,10 +29,6 @@ tasks:
     cd jerboa
     make jerboa
     echo 'export PATH="$HOME/jerboa/dist:$PATH"' >> ~/.buildenv
-- setup-rust: |
-    # Install Rust toolchain matching jerboa's native FFI build.
-    curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --profile minimal --default-toolchain 1.88.0
-    echo 'source "$HOME/.cargo/env"' >> ~/.buildenv
 - package: |
     cd jerboa-secmon
     J="$HOME/jerboa/dist/jerboa"