remove no longer maintained package

Author: mnphpexpert

composer.json

@@ -29,7 +29,6 @@
         "phpunit/phpunit": "^6.0|^7.0|^8.0",
         "orchestra/testbench": "^3.1|^4.0",
         "mockery/mockery": "^1.0",
-        "satooshi/php-coveralls": "^2.0",
         "php-coveralls/php-coveralls": "^2.1",
         "doctrine/dbal": "^2.5",
         "phpunit/phpcov": "5.0.0"