Remove noise SAL_INFO that even crashed when pPrefix was NULL

Not sure why it crashed only on macOS?

Change-Id: I9578d7de39e22ba79950c6b47aad26944a5d0fa2

unoxml/source/dom/node.cxx

@@ -82,9 +82,6 @@ namespace DOM
                 strlen(reinterpret_cast<const char*>(pHref)),
                 RTL_TEXTENCODING_UTF8);
 
-            SAL_INFO("unoxml", "Trying to add namespace " << reinterpret_cast<const char*>(pHref) <<
-                               "(prefix " << reinterpret_cast<const char*>(pPrefix) << ")" );
-
             Context::NamespaceMapType::iterator aIter=
                 io_rContext.maNamespaceMap.find(val);
             if( aIter != io_rContext.maNamespaceMap.end() )