Disable clippy

Cargo tries to lint all of the path dependencies, so it's disabled for now

rust-lang/rust-clippy#1066

.travis.yml

@@ -20,9 +20,14 @@ matrix:
 before_install:
   - sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-8 60 --slave /usr/bin/g++ g++ /usr/bin/g++-8
   - g++ -v
-  - rustup component add clippy-preview rustfmt-preview
+  # Cargo tries to lint all of the path dependencies, so it's disabled for now
+  # https://github.com/rust-lang/rust-clippy/issues/1066
+  # - rustup component add clippy --toolchain=nightly || cargo install --git https://github.com/rust-lang/rust-clippy/ --force clippy
+  - rustup component add rustfmt --toolchain=nightly || cargo install --git https://github.com/rust-lang/rustfmt/ --force clippy
 script:
   - travis_wait 30 cargo build
   - cargo test
-  - cargo clippy --all-targets --all-features -- -D warnings
+  # Cargo tries to lint all of the path dependencies, so it's disabled for now
+  # https://github.com/rust-lang/rust-clippy/issues/1066
+  # - cargo clippy --all-targets --all-features -- -D warnings
   - cargo fmt --all -- --check

tests/spec.rs

@@ -9,8 +9,7 @@ CONDITIONS OF ANY KIND, either express or implied. See the License for the
 specific language governing permissions and limitations under the License.
 */
 
-#![allow(unknown_lints)]
-#![allow(identity_op)]
+#![allow(clippy::identity_op)]
 
 extern crate cssparser;
 extern crate html5ever;