Revert example changes per review feedback

Co-authored-by: h2zero <32826625+h2zero@users.noreply.github.com>

Author: Copilot

examples/NimBLE_Client/NimBLE_Client.ino

@@ -34,16 +34,6 @@ class ClientCallbacks : public NimBLEClientCallbacks {
         NimBLEDevice::injectPassKey(connInfo, 123456);
     }
 
-    uint32_t onPassKeyDisplay(NimBLEConnInfo& connInfo) override {
-        Serial.printf("Client Passkey Display\n");
-        /**
-         * This should return a random 6 digit number for security
-         * or make your own static passkey as done here.
-         * The peer device must enter this passkey to complete the pairing.
-         */
-        return 123456;
-    }
-
     void onConfirmPasskey(NimBLEConnInfo& connInfo, uint32_t pass_key) override {
         Serial.printf("The passkey YES/NO number: %" PRIu32 "\n", pass_key);
         /** Inject false if passkeys don't match. */

examples/NimBLE_Server/NimBLE_Server.ino

@@ -49,14 +49,6 @@ class ServerCallbacks : public NimBLEServerCallbacks {
         return 123456;
     }
 
-    void onPassKeyEntry(NimBLEConnInfo& connInfo) override {
-        Serial.printf("Server Passkey Entry\n");
-        /**
-         * Respond with the passkey displayed on the peer device.
-         */
-        NimBLEDevice::injectPassKey(connInfo, 123456);
-    }
-
     void onConfirmPassKey(NimBLEConnInfo& connInfo, uint32_t pass_key) override {
         Serial.printf("The passkey YES/NO number: %" PRIu32 "\n", pass_key);
         /** Inject false if passkeys don't match. */