Remove non-working WiFi examples and fix some that require changes

Author: me-no-dev

libraries/WiFi/examples/HTTPSRequest/HTTPSRequest.ino

@@ -14,12 +14,12 @@ void WiFiEvent(WiFiEvent_t event)
     Serial.printf("[WiFi-event] event: %d\n", event);
 
     switch(event) {
-    case WIFI_EVENT_STAMODE_GOT_IP:
+    case SYSTEM_EVENT_STA_GOT_IP:
         Serial.println("WiFi connected");
         Serial.println("IP address: ");
         Serial.println(WiFi.localIP());
         break;
-    case WIFI_EVENT_STAMODE_DISCONNECTED:
+    case SYSTEM_EVENT_STA_DISCONNECTED:
         Serial.println("WiFi lost connection");
         break;
     }

libraries/WiFi/examples/NTPClient/NTPClient.ino

@@ -37,7 +37,7 @@ void loop()
             Serial.print(" (");
             Serial.print(WiFi.RSSI(i));
             Serial.print(")");
-            Serial.println((WiFi.encryptionType(i) == ENC_TYPE_NONE)?" ":"*");
+            Serial.println((WiFi.encryptionType(i) == WIFI_AUTH_OPEN)?" ":"*");
             delay(10);
         }
     }