RT3548: Remvoe unsupported platforms

This commit removes SunOS (a sentimental favorite of mine).

Reviewed-by: Richard Levitte <levitte@openssl.org>

e_os2.h

@@ -168,9 +168,6 @@ extern "C" {
 # ifdef OPENSSL_SYSNAME_MACOSX
 #  define OPENSSL_SYS_MACOSX
 # endif
-# ifdef OPENSSL_SYSNAME_SUNOS
-#  define OPENSSL_SYS_SUNOS
-#endif
 # if defined(_CRAY) || defined(OPENSSL_SYSNAME_CRAY)
 #  define OPENSSL_SYS_CRAY
 # endif
@@ -269,10 +266,6 @@ extern "C" {
 #  define ossl_ssize_t long
 #endif
 
-#if defined(OPENSSL_SYS_SUNOS)
-#  define ssize_t int
-#endif
-
 #if defined(__ultrix) && !defined(ssize_t)
 #  define ossl_ssize_t int 
 #endif