rados_sync.cc: remove dead and not needed code

The first if handles all chars < 32, the last 2 if's check for
'\n' (10) and '\r' (13). This code will never be reached and
is already covered. Remove unneeded code.

CID 1019549 Logically dead code (CWE-561)

Signed-off-by: Danny Al-Gaaf <danny.al-gaaf@bisect.de>