Optimize logfile write (#1652)

* remove no longer needed OpenFileAndWait()

* remove WriteToDedicatedFile

* .

Co-authored-by: CaCO3 <caco@ruinelli.ch>

code/components/jomjol_fileserver_ota/server_ota.cpp

@@ -154,7 +154,7 @@ static bool ota_update_task(std::string fn)
 
     int data_read;     
 
-    FILE* f = OpenFileAndWait(fn.c_str(), "rb");     // previously only "r
+    FILE* f = fopen(fn.c_str(), "rb");     // previously only "r
 
     if (f == NULL) { // File does not exist
         return false;