[BREAKING] - Remove ignore list.

This removes the ignore list feature as it can be implemented by the application if desired.
The scan will now ignore any device we are connected to already by checking for any connected client with the same peer address.

examples/Advanced/NimBLE_Client/main/main.cpp

@@ -343,9 +343,6 @@ void app_main (void){
     /** Optional: set the transmit power, default is -3db */
     NimBLEDevice::setPower(ESP_PWR_LVL_P9); /** 12db */
 
-    /** Optional: set any devices you don't want to get advertisments from */
-    // NimBLEDevice::addIgnored(NimBLEAddress ("aa:bb:cc:dd:ee:ff"));
-
     /** create new scan */
     NimBLEScan* pScan = NimBLEDevice::getScan();