Remove meaningless clause

We stated that curves were listed "in order of preference", but we never
explained what the preference was, so this was not meaningful.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
diff --git a/include/mbedtls/ecp.h b/include/mbedtls/ecp.h
index f278d10..1e614ed 100644
--- a/include/mbedtls/ecp.h
+++ b/include/mbedtls/ecp.h
@@ -467,8 +467,7 @@
 
 /**
  * \brief           This function retrieves the information defined in
- *                  mbedtls_ecp_curve_info() for all supported curves in order
- *                  of preference.
+ *                  mbedtls_ecp_curve_info() for all supported curves.
  *
  * \note            This function returns information about all curves
  *                  supported by the library. Some curves may not be