bluetooth: fast_pair: Drop TinyCrypt Fast Pair crypto backend

TinyCrypt library is no longer supported by Zephyr.

Jira: NCSDK-35445

Signed-off-by: Marek Pieta <Marek.Pieta@nordicsemi.no>

Author: MarekPieta

doc/nrf/libraries/bluetooth/services/fast_pair/core.rst

@@ -43,7 +43,7 @@ With the :kconfig:option:`CONFIG_BT_FAST_PAIR` Kconfig option enabled, the follo
 * :kconfig:option:`CONFIG_BT_FAST_PAIR_STORAGE_USER_RESET_ACTION` - The option enables user reset action that is executed together with the Fast Pair factory reset operation.
   See the :ref:`ug_bt_fast_pair_factory_reset_custom_user_reset_action` for more details.
 * :kconfig:option:`CONFIG_BT_FAST_PAIR_STORAGE_ACCOUNT_KEY_MAX` - The option configures maximum number of stored Account Keys.
-* :kconfig:option:`CONFIG_BT_FAST_PAIR_CRYPTO_TINYCRYPT`, :kconfig:option:`CONFIG_BT_FAST_PAIR_CRYPTO_OBERON`, and :kconfig:option:`CONFIG_BT_FAST_PAIR_CRYPTO_PSA` - These options are used to select the cryptographic backend for Fast Pair.
+* :kconfig:option:`CONFIG_BT_FAST_PAIR_CRYPTO_OBERON`, and :kconfig:option:`CONFIG_BT_FAST_PAIR_CRYPTO_PSA` - These options are used to select the cryptographic backend for Fast Pair.
   The Oberon backend is used by default.
 * :kconfig:option:`CONFIG_BT_FAST_PAIR_BOND_MANAGER` - The option enables the Fast Pair bond management functionality.
   See :ref:`ug_bt_fast_pair_gatt_service_bond_management` for more details.

subsys/bluetooth/services/fast_pair/fp_crypto/CMakeLists.txt

@@ -13,9 +13,6 @@ if(CONFIG_BT_FAST_PAIR_CRYPTO_OBERON)
   target_sources(fp_crypto PRIVATE fp_crypto_oberon.c)
   target_link_libraries(fp_crypto PRIVATE nrfxlib_crypto)
 endif()
-if(CONFIG_BT_FAST_PAIR_CRYPTO_TINYCRYPT)
-  target_sources(fp_crypto PRIVATE fp_crypto_tinycrypt.c)
-endif()
 if(CONFIG_BT_FAST_PAIR_CRYPTO_PSA)
   target_sources(fp_crypto PRIVATE fp_crypto_psa.c)
 endif()

subsys/bluetooth/services/fast_pair/fp_crypto/Kconfig.fp_crypto

@@ -18,16 +18,6 @@ choice BT_FAST_PAIR_CRYPTO_BACKEND
 	help
 	  Select the Fast Pair cryptographic backend.
 
-config BT_FAST_PAIR_CRYPTO_TINYCRYPT
-	bool "Fast Pair with Tinycrypt cryptographic backend"
-	select TINYCRYPT
-	select TINYCRYPT_SHA256
-	select TINYCRYPT_SHA256_HMAC
-	select TINYCRYPT_AES
-	select TINYCRYPT_ECC_DH
-	help
-	  Select Tinycrypt cryptographic backend for Fast Pair.
-
 config BT_FAST_PAIR_CRYPTO_OBERON
 	bool "Fast Pair with Oberon cryptographic backend"
 	select NRF_OBERON