cipher: Remove specialized rmd160 functions.
* cipher/rmd160.c: Replace rmd.h by hash-common.h. (RMD160_CONTEXT): Move from rmd.h to here. (_gcry_rmd160_init): Remove. (_gcry_rmd160_mixblock): Remove. (_gcry_rmd160_hash_buffer): Use rmd160_init directly. * cipher/md.c: Remove rmd.h which was not actually used. * cipher/rmd.h: Remove. * cipher/Makefile.am (libcipher_la_SOURCES): Remove rmd.h. * configure.ac (USE_RMD160): Allow to build without RMD160.
Those functions are not anymore required because random-csprng.c now
uses SHA-1.
- Signed-off-by: Werner Koch <wk@gnupg.org>