Remove unused function after changes in commit 70a8bbd.

Author: eduar-hte

src/utils/shared_files.h

@@ -59,10 +59,6 @@ class SharedFiles {
     using handlers_map = std::unordered_map<std::string, handler_info>;
     handlers_map m_handlers;
 
-    handlers_map::iterator find_handler(
-        const std::string &fileName) {
-        return m_handlers.find(fileName);
-    }
     handlers_map::iterator add_new_handler(
         const std::string &fileName, std::string *error);
 };