Clean up code according to PhpStorm inspections report

src/Generator/DefaultTimeGenerator.php

@@ -14,8 +14,11 @@
 
 namespace Ramsey\Uuid\Generator;
 
+use Exception;
+use InvalidArgumentException;
 use Ramsey\Uuid\BinaryUtils;
 use Ramsey\Uuid\Converter\TimeConverterInterface;
+use Ramsey\Uuid\Exception\UnsatisfiedDependencyException;
 use Ramsey\Uuid\Provider\NodeProviderInterface;
 use Ramsey\Uuid\Provider\TimeProviderInterface;
 
@@ -72,10 +75,10 @@ class DefaultTimeGenerator implements TimeGeneratorInterface
      *     could arise when the clock is set backwards in time or if the node ID
      *     changes.
      * @return string A binary string
-     * @throws \Ramsey\Uuid\Exception\UnsatisfiedDependencyException if called on a 32-bit system and
+     * @throws UnsatisfiedDependencyException if called on a 32-bit system and
      *     `Moontoast\Math\BigNumber` is not present
-     * @throws \InvalidArgumentException
-     * @throws \Exception if it was not possible to gather sufficient entropy
+     * @throws InvalidArgumentException
+     * @throws Exception if it was not possible to gather sufficient entropy
      */
     public function generate($node = null, $clockSeq = null)
     {
@@ -115,8 +118,8 @@ class DefaultTimeGenerator implements TimeGeneratorInterface
      *
      * @param string|int $node A node value that may be used to override the node provider
      * @return string Hexadecimal representation of the node ID
-     * @throws \InvalidArgumentException
-     * @throws \Exception
+     * @throws InvalidArgumentException
+     * @throws Exception
      */
     protected function getValidNode($node)
     {
@@ -130,7 +133,7 @@ class DefaultTimeGenerator implements TimeGeneratorInterface
         }
 
         if (!ctype_xdigit($node) || strlen($node) > 12) {
-            throw new \InvalidArgumentException('Invalid node value');
+            throw new InvalidArgumentException('Invalid node value');
         }
 
         return strtolower(sprintf('%012s', $node));