Remove ECDSA error code hack in evp_test.

This is no longer necessary as of
7ed2e82e5ac2df9c9468a05dc738da8523e09fda.

Change-Id: I02d4df0bc92bf3c5826e9e4f27ce153ae419c258
Reviewed-on: https://boringssl-review.googlesource.com/16505
Reviewed-by: Adam Langley <agl@google.com>

crypto/evp/evp_test.cc

diff --git a/crypto/evp/evp_test.cc b/crypto/evp/evp_test.cc
index baf41fe..24de98d 100644
--- a/crypto/evp/evp_test.cc
+++ b/crypto/evp/evp_test.cc
@@ -277,9 +277,6 @@
     if (!t->GetBytes(&output, "Output") ||
         !verify_op(ctx.get(), output.data(), output.size(), input.data(),
                    input.size())) {
-      // ECDSA sometimes doesn't push an error code. Push one on the error queue
-      // so it's distinguishable from other errors.
-      OPENSSL_PUT_ERROR(USER, ERR_R_EVP_LIB);
       return false;
     }
     return true;