minor #27363 [DI] remove dead code (nicolas-grekas)

This PR was merged into the 3.4 branch.

Discussion
----------

[DI] remove dead code

| Q             | A
| ------------- | ---
| Branch?       | 3.4
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| License       | MIT
| Doc PR        | -

Commits
-------

1314a952cd [DI] remove dead code

Author: nicolas-grekas

LazyProxy/ProxyHelper.php

@@ -62,17 +62,4 @@ public static function getTypeHint(\ReflectionFunctionAbstract $r, \ReflectionPa
             return $prefix.$parent->name;
         }
     }
-
-    private static function export($value)
-    {
-        if (!is_array($value)) {
-            return var_export($value, true);
-        }
-        $code = array();
-        foreach ($value as $k => $v) {
-            $code[] = sprintf('%s => %s', var_export($k, true), self::export($v));
-        }
-
-        return sprintf('array(%s)', implode(', ', $code));
-    }
 }