Remove external code coverage and fix scrutinizer issues

.scrutinizer.yml

@@ -2,14 +2,6 @@ before_commands:
     - "composer install --no-dev --prefer-source"
 
 tools:
-    external_code_coverage:
-        enabled: true
-        timeout: 300
-        filter:
-            excluded_paths: ["tests", "vendor"]
-    php_code_coverage:
-        enabled: false
-        test_command: phpunit -c phpunit.xml.dist
     php_code_sniffer:
         enabled: true
         config: