Only disable Arduino OTA when using -D WLED_DISABLE_OTA

- since Update object is accessible even with ArduinoOTA disabled it should possible to use HTTP OTA regardless
- this saves about 12kB while still allowing OTA updates
- HTTP OTA updates can be blocked using PIN or OTA lock

wled00/wled_server.cpp

@@ -365,7 +365,6 @@ void initServer()
   createEditHandler(correctPIN);
 
   static const char _update[] PROGMEM = "/update";
-#ifndef WLED_DISABLE_OTA
   //init ota page
   server.on(_update, HTTP_GET, [](AsyncWebServerRequest *request){
     if (otaLock) {
@@ -419,12 +418,6 @@ void initServer()
       }
     }
   });
-#else
-  server.on(_update, HTTP_GET, [](AsyncWebServerRequest *request){
-    serveMessage(request, 501, FPSTR(s_notimplemented), F("OTA updating is disabled in this build."), 254);
-  });
-#endif
-
 
 #ifdef WLED_ENABLE_DMX
   server.on(F("/dmxmap"), HTTP_GET, [](AsyncWebServerRequest *request){