remove some unused deps

Author: goetas

composer.json

@@ -26,9 +26,7 @@
         "php" : ">=5.3.0"
     },
     "require-dev": {
-        "satooshi/php-coveralls": "1.0.*",
-        "phpunit/phpunit" : "^4.8.35",
-        "sami/sami": "~2.0"
+        "phpunit/phpunit" : "^4.8.35"
     },
     "autoload": {
         "psr-4": {"Masterminds\\": "src"}