Remove EGD

EGD was only necessary for some commercial UNIX systems, versions that
needed
it all reached end of life.
EGD needed until        OS release date
IRIX 6.5.19   feb 2003
Solaris 2.6                     jul 1997
AIX     5.2                     oct 2002
Tru64   5.1B                    sep 2002
HP-UX   11i v2                  sep 2003
https://en.wikipedia.org/wiki//dev/random#EGD_as_an_alternative

Author: Sp1l

src/cryptography/hazmat/bindings/openssl/rand.py

@@ -16,9 +16,6 @@
 void RAND_seed(const void *, int);
 void RAND_add(const void *, int, double);
 int RAND_status(void);
-int RAND_egd(const char *);
-int RAND_egd_bytes(const char *, int);
-int RAND_query_egd_bytes(const char *, unsigned char *, int);
 const char *RAND_file_name(char *, size_t);
 int RAND_load_file(const char *, long);
 int RAND_write_file(const char *);