Revert "Tweak extension loading"

This reverts commit 9cf8fb3810c3d0c0c9a3de1e3adb60198ac02f61.

.travis.yml

@@ -22,9 +22,8 @@ matrix:
   fast_finish: true
 
 before_script:
-  - if [[ $TRAVIS_PHP_VERSION = 5.* ]]; then echo "extension = mongo.so" >> ~/.phpenv/versions/$(phpenv version-name)/etc/php.ini; else; echo "extension = mongodb.so" >> ~/.phpenv/versions/$(phpenv version-name)/etc/php.ini; fi
+  - if [[ $TRAVIS_PHP_VERSION = 5.* ]]; then echo "extension = mongo.so" >> ~/.phpenv/versions/$(phpenv version-name)/etc/php.ini; fi
   - if [ "`phpenv version-name`" != "hhvm" ]; then echo "extension = amqp.so" >> ~/.phpenv/versions/$(phpenv version-name)/etc/php.ini; fi
-  - if [ "`phpenv version-name`" != "hhvm" ]; then echo "extension = redis.so" >> ~/.phpenv/versions/$(phpenv version-name)/etc/php.ini; fi
   - if [ "$deps" == "low" ]; then composer update --prefer-source --prefer-lowest --prefer-stable; fi
   - if [ "$deps" != "low" ]; then composer install --prefer-source; fi