Update .travis.yml

Removed old unit tests. As all APIs are covered by sample codes, old unit tests are redundant.

Author: ashtru

.travis.yml

@@ -4,7 +4,6 @@ sudo: false
 
 env:
     - TEST_SUITE=samples
-    - TEST_SUITE=coverage
 
 php:
     - 5.6
@@ -29,9 +28,8 @@ before_script:
 script:
     # execute all of the tests or other commands to determine
     # whether the build will pass or fail
-    - if [[ "$TEST_SUITE" == "coverage" ]]; then vendor/phpunit/phpunit/phpunit --coverage-clover=coverage.clover; fi
     - if [[ "$TEST_SUITE" == "samples" ]]; then phpenv config-rm xdebug.ini; cd sample-code-php; composer install --prefer-dist; vendor/phpunit/phpunit/phpunit test-runner.php .; fi
 
 after_script:
 #    - if [[ "$TEST_SUITE" == "coverage" ]]; then wget https://scrutinizer-ci.com/ocular.phar; fi
-#    - if [[ "$TEST_SUITE" == "coverage" ]]; then php ocular.phar code-coverage:upload --format=php-clover coverage.clover; fi
+#    - if [[ "$TEST_SUITE" == "coverage" ]]; then php ocular.phar code-coverage:upload --format=php-clover coverage.clover; fi