remove ignore_bit_strings (#276)

Author: bshaffer

src/JWT.php

@@ -499,9 +499,7 @@ private static function readDER($der, $offset = 0)
         if ($type == self::ASN1_BIT_STRING) {
             $pos++; // Skip the first contents octet (padding indicator)
             $data = substr($der, $pos, $len - 1);
-            if (!$ignore_bit_strings) {
-                $pos += $len - 1;
-            }
+            $pos += $len - 1;
         } elseif (!$constructed) {
             $data = substr($der, $pos, $len);
             $pos += $len;