doc: Bluetooth: Remove note about ZLL requiring Tinycrypt

This configuration no longer exists. Also, the ECDH generation
in the controller was also removed from the SoftDevice Controller,
so no additional configuration change is needed.

Signed-off-by: Rubin Gerritsen <[email protected]>

Author: rugeGerritsen

doc/nrf/protocols/bt/bt_stack_arch.rst

@@ -94,9 +94,6 @@ Exceptions are the :ref:`ble_llpm` sample, which requires the SoftDevice Control
 By default, all samples are currently configured to use SoftDevice Controller.
 To use the Zephyr Bluetooth LE Controller instead, use the :ref:`bt-ll-sw-split <zephyr:snippet-bt-ll-sw-split>` snippet (see :ref:`app_build_snippets`) and make sure to build from a clean build directory.
 
-.. note::
-   If your Bluetooth application requires the LE Secure Connections pairing and you want to use the Zephyr Bluetooth LE Controller, make sure to enable the :kconfig:option:`CONFIG_BT_TINYCRYPT_ECC` Kconfig option as the ECDH cryptography is not supported by this Bluetooth LE Controller.
-
 Zephyr Host
 ***********