clang-tidy: remove const

It doesn't do what it's supposed to here.

Found with misc-misplaced-const

Signed-off-by: Rosen Penev <[email protected]>

Author: neheb

src/xmp.cpp

@@ -53,7 +53,7 @@ class XMLValidator {
   // error out if the depth exceeds this limit.
   static const size_t max_recursion_limit_ = 1000;
 
-  const XML_Parser parser_;
+  XML_Parser parser_;
 
  public:
   // Runs an XML parser on `buf`. Throws an exception if the XML is invalid.