Remove useless declaration

Signed-off-by: Xiaokang Qian <xiaokang.qian@arm.com>
diff --git a/library/psa_crypto_driver_wrappers.h b/library/psa_crypto_driver_wrappers.h
index c784034..a8cb87e 100644
--- a/library/psa_crypto_driver_wrappers.h
+++ b/library/psa_crypto_driver_wrappers.h
@@ -29,12 +29,6 @@
 #endif /* MBEDTLS_PSA_P256M_DRIVER_ENABLED */
 
 /*
- * Initialization and termination functions
- */
-static inline psa_status_t psa_driver_wrapper_init(void);
-static inline void psa_driver_wrapper_free(void);
-
-/*
  * Signature functions
  */
 static inline psa_status_t psa_driver_wrapper_sign_message(