Remove mistaken typedef from 83a82981dc81.

(This broke the Windows build at least.)

Change-Id: I09f088258dc4949554b30c822f8c6cdfa7cd84ff
diff --git a/crypto/ecdsa/ecdsa_test.c b/crypto/ecdsa/ecdsa_test.c
index ffd6f53..16b474d 100644
--- a/crypto/ecdsa/ecdsa_test.c
+++ b/crypto/ecdsa/ecdsa_test.c
@@ -60,7 +60,7 @@
 #include <openssl/obj.h>
 #include <openssl/rand.h>
 
-typedef enum api_t {
+enum api_t {
   encoded_api,
   raw_api,
 };