ci: Do not install addons on rustfmt build jobs

tesuji · tesuji · commit 762b885c076a · 2019-06-17T23:13:06.000+07:00
diff --git a/.travis.yml b/.travis.yml
@@ -10,6 +10,7 @@ matrix:
     - name: "rustfmt"
       env: TARGET=x86_64-unknown-linux-gnu
       rust: stable
+      addons:
       before_script:
         - rustup component add rustfmt
       script:
