Remove un-necessary typedefs in `md5module.c` and `sha1module.c`

[picnixz]

We have some legacy typedefs that are no more needed as we're using HACL* and not our own implementation for MD5 and SHA-1:

#if SIZEOF_INT == 4
typedef unsigned int MD5_INT32; /* 32-bit integer */
typedef long long MD5_INT64; /* 64-bit integer */
#else
/* not defined. compilation will die. */
#endif

#if SIZEOF_INT == 4
typedef unsigned int SHA1_INT32;        /* 32-bit integer */
typedef long long SHA1_INT64;        /* 64-bit integer */
#else
/* not defined. compilation will die. */
#endif

Linked PRs

• gh-131418: remove unused legacy typedefs in {md5,sha1}module.c #131420
• [3.12] gh-131418: remove unused legacy typedefs in {md5,sha1}module.c (GH-131420) #131619
• [3.13] gh-131418: remove unused legacy typedefs in {md5,sha1}module.c (GH-131420) #131620