Revert "Mark toString() method as deprecated, scheduled for removal i…

…n 4.0.0"

This reverts commit 4c467ce.

For more information, please see the discussion at:
4c467ce#commitcomment-31174263

Also refer to the discussion at:
ShittySoft/symfony-live-berlin-2018-doctrine-tutorial#3 (comment)

TL;DR: I am retaining `toString()` for improved static analysis and
long-term stability.

src/Uuid.php

@@ -590,14 +590,6 @@ public function getVersion()
         return null;
     }
 
-    /**
-     * {@inheritdoc}
-     *
-     * @deprecated In ramsey/uuid 4.0.0, this method will be replaced with the
-     *     __toString() magic method, which is already available on this class.
-     *     The new recommendation is to cast Uuid objects to string, rather than
-     *     calling `toString()`.
-     */
     public function toString()
     {
         return $this->codec->encode($this);

src/UuidInterface.php

@@ -268,10 +268,6 @@ public function getVersion();
     /**
      * Converts this UUID into a string representation.
      *
-     * @deprecated In ramsey/uuid 4.0.0, this method will be replaced with the
-     *     __toString() magic method, which is currently available in the
-     *     Uuid concrete class. The new recommendation is to cast Uuid objects
-     *     to string, rather than calling `toString()`.
      * @return string
      */
     public function toString();