Merge pull request dtolnay#129 from dtolnay/exempt

Remove semver exempt testing from 1.15 and stable builds

Author: alexcrichton

.travis.yml

@@ -6,7 +6,6 @@ matrix:
     - rust: 1.15.0
     - rust: stable
     - rust: beta
-      script: cargo test
     - rust: nightly
       install: rustup target add wasm32-unknown-unknown
       script: cargo test --target wasm32-unknown-unknown --no-run
@@ -24,7 +23,6 @@ before_script:
 
 script:
   - cargo test
-  - RUSTFLAGS='--cfg procmacro2_semver_exempt' cargo test
 
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