Removing reflection based system for callable detection

composer.json

@@ -16,8 +16,7 @@
         "symfony/framework-bundle": "^2.7 | ^3.0",
         "puli/cli": "^1.0",
         "puli/symfony-bundle": "^1.0",
-        "thecodingmachine/service-provider-registry": "^1.0",
-        "php-di/invoker": "^1.3"
+        "thecodingmachine/service-provider-registry": "^1.0"
     },
     "require-dev": {
         "php": ">=5.6",

src/ServiceProviderCompilationPass.php

@@ -145,16 +145,8 @@ private function getServiceDefinitionFromCallable($serviceName, $serviceProvider
         $factoryDefinition = new Definition('Class'); // TODO: in PHP7, we can get the return type of the function!
         $containerDefinition = new Reference('interop_service_provider_acclimated_container');
 
-        $callableReflection = CallableReflection::create($callable);
-
-        if ($callableReflection instanceof \ReflectionMethod && $callableReflection->isStatic() && $callableReflection->isPublic()) {
-            $factoryDefinition->setFactory([
-                $callableReflection->getDeclaringClass()->getName(),
-                $callableReflection->getName()
-            ]);
-            $factoryDefinition->addArgument(new Reference('interop_service_provider_acclimated_container'));
-        } elseif ($callableReflection instanceof \ReflectionFunction && !$callable instanceof \Closure) {
-            $factoryDefinition->setFactory($callableReflection->getName());
+        if ((is_array($callable) && is_string($callable[0])) || is_string($callable)) {
+            $factoryDefinition->setFactory($callable);
             $factoryDefinition->addArgument(new Reference('interop_service_provider_acclimated_container'));
         } else {
             $factoryDefinition->setFactory([ new Reference('service_provider_registry_'.$this->registryId), 'createService' ]);