rust: remove duplicate constants definitions in C

src/rust.h

@@ -25,15 +25,6 @@ typedef struct HttpRangeContainerBlock HttpRangeContainerBlock;
 #include "rust-context.h"
 #include "rust-bindings.h"
 
-/* Some manual exports from Rust as we are not yet exporting constants with
- * cbindgen. */
-#define SC_MD5_LEN    16
-#define SC_SHA1_LEN   20
-#define SC_SHA256_LEN 32
-
-/* Length of an MD5 hex string, not including a trailing NUL. */
-#define SC_MD5_HEX_LEN 32
-
 #define JB_SET_STRING(jb, key, val) jb_set_formatted((jb), "\"" key "\":\"" val "\"")
 #define JB_SET_TRUE(jb, key) jb_set_formatted((jb), "\"" key "\":true")
 #define JB_SET_FALSE(jb, key) jb_set_formatted((jb), "\"" key "\":false")