Revert "codership/mariadb-wsrep#27 Galera cache encryption"

This reverts commit 7e9419e811.

include/wsrep/server_service.hpp

@@ -197,6 +197,7 @@ namespace wsrep
                               const wsrep::gtid& gtid,
                               bool bypass) = 0;
 
+
         /**
          * Wait until committing transactions have completed.
          * Prior calling this method the server should have been
@@ -210,16 +211,6 @@ namespace wsrep
          */
         virtual void debug_sync(const char* sync_point) = 0;
 
-        /*
-         * Encrypt/decrypt data
-         */
-        virtual int do_crypt(void**                ctx,
-                             wsrep::const_buffer&  key,
-                             const char            (*iv)[32],
-                             wsrep::const_buffer&  input,
-                             void*                 output,
-                             bool                  encrypt,
-                             bool                  last) = 0;
     };
 }