Clean some dead and unused code

Author: lisachenko

src/ReflectionClass.php

@@ -12,7 +12,6 @@
 
 use Go\ParserReflection\Traits\InternalPropertiesEmulationTrait;
 use Go\ParserReflection\Traits\ReflectionClassLikeTrait;
-use PhpParser\Node\Name;
 use PhpParser\Node\Name\FullyQualified;
 use PhpParser\Node\Stmt\ClassLike;
 use PhpParser\Node\Stmt\Interface_;

src/ReflectionParameter.php

@@ -122,7 +122,6 @@ public function ___debugInfo()
     public function __toString()
     {
         $parameterType   = $this->getType();
-        $isNullableParam = !empty($parameterType) && $this->allowsNull();
         $isOptional      = $this->isOptional();
         $hasDefaultValue = $this->isDefaultValueAvailable();
         $defaultValue    = '';

src/Traits/ReflectionFunctionLikeTrait.php

@@ -13,7 +13,6 @@
 
 use Go\ParserReflection\NodeVisitor\GeneratorDetector;
 use Go\ParserReflection\NodeVisitor\StaticVariablesCollector;
-use Go\ParserReflection\ReflectionFileNamespace;
 use Go\ParserReflection\ReflectionParameter;
 use Go\ParserReflection\ReflectionType;
 use PhpParser\Node\Expr\Closure;