crypto: ecc - delete a useless function declaration

This function declaration has been added in 'ecc_curve.h',
delete it in 'crypto/ecc.h'.

Fixes: 4e660291(crypto: ecdsa - Add support for ECDSA ...)
Signed-off-by: Meng Yu <yumeng18@huawei.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto/ecc.h

@@ -55,14 +55,6 @@ static inline void ecc_swap_digits(const u64 *in, u64 *out, unsigned int ndigits
 		out[i] = be64_to_cpu(src[ndigits - 1 - i]);
 }
 
-/**
- * ecc_get_curve()  - Get a curve given its curve_id
- * @curve_id:  Id of the curve
- *
- * Returns pointer to the curve data, NULL if curve is not available
- */
-const struct ecc_curve *ecc_get_curve(unsigned int curve_id);
-
 /**
  * ecc_is_key_valid() - Validate a given ECDH private key
  *