Remove duplicated Rust installation

.cirrus.yml

@@ -90,10 +90,6 @@ yjit_task:
  matrix:
  - CC: gcc-11
  configure: --enable-yjit
- install_rust_script:
- - sudo apt-get update -y
- - sudo apt-get install -y curl
- - "curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y $rustup_init"
  << : *CONFIG_TEMPLATE
  make_miniruby_script: make miniruby
  make_bindgen_script: |
@@ -110,4 +106,4 @@ yjit_task:
  make_test_script: make test RUN_OPTS="--yjit-call-threshold=1 --yjit-verify-ctx"
  make_test_all_script: make test-all RUN_OPTS="--yjit-call-threshold=1 --yjit-verify-ctx" TESTOPTS="$RUBY_TESTOPTS"
  make_test_spec_script: make test-spec RUN_OPTS="--yjit-call-threshold=1 --yjit-verify-ctx"
- clippy_script: cd yjit && cargo clippy --all-targets --all-features
+ clippy_script: cd yjit && rustup component add clippy && cargo clippy --all-targets --all-features