Add namespace to method_intercept.php and remove unused use statement

The namespace Ray\Aop was added to the method_intercept.php file to align it with the rest of the project's structure. Additionally, an unused use statement referencing MethodInterceptorInterface was removed from Aspect.php to clean up the code.

src-mock/method_intercept.php

@@ -1,5 +1,7 @@
 <?php
 
+namespace Ray\Aop;
+
 if (! function_exists('method_intercept')) {
     /**
      * @return mixed

src/Aspect.php

@@ -4,7 +4,6 @@
 
 namespace Ray\Aop;
 
-use MethodInterceptorInterface;
 use RecursiveDirectoryIterator;
 use RecursiveIteratorIterator;
 use ReflectionClass;