Remove MBEDTLS_OID_C from sample configs

This option no longer exists (and there's a Changelog entry saying so).

After this commit, git grep -l -w MBEDTLS_OID_C shows the only remaining
occurences are in text files (.txt, .md).

Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
diff --git a/configs/crypto-config-suite-b.h b/configs/crypto-config-suite-b.h
index 3fec3d0..dd304c1 100644
--- a/configs/crypto-config-suite-b.h
+++ b/configs/crypto-config-suite-b.h
@@ -49,7 +49,6 @@
 #define MBEDTLS_ASN1_WRITE_C
 #define MBEDTLS_CTR_DRBG_C
 #define MBEDTLS_ENTROPY_C
-#define MBEDTLS_OID_C
 #define MBEDTLS_PK_C
 #define MBEDTLS_PK_PARSE_C
 
diff --git a/configs/crypto-config-thread.h b/configs/crypto-config-thread.h
index f71b1f0..18206e1 100644
--- a/configs/crypto-config-thread.h
+++ b/configs/crypto-config-thread.h
@@ -58,7 +58,6 @@
 #define MBEDTLS_ENTROPY_C
 #define MBEDTLS_HMAC_DRBG_C
 #define MBEDTLS_MD_C
-#define MBEDTLS_OID_C
 #define MBEDTLS_PK_C
 #define MBEDTLS_PK_PARSE_C