Remove unexist task

Author: LionZXY

.travis.yml

@@ -1,10 +1,5 @@
 language: java
-jdk:
-  - oraclejdk8
-before_script:
-  - chmod +x gradlew
-script:
-  - ./gradlew check
-  - ./gradlew codeCoverageReport
+sudo: false # faster builds
+
 after_success:
   - bash <(curl -s https://codecov.io/bash)