[LyX/master] Mark dead code as dead

[Jean-Marc]

commit 41cb3bbc0ee4f505a264c48a711c0110ed0baab6
Author: Jean-Marc <lasgout...@lyx.org>
Date:   Sat Sep 12 18:49:22 2015 +0200

    Mark dead code as dead
    
    Coverity issue 23511.

diff --git a/src/support/userinfo.cpp b/src/support/userinfo.cpp
index af33d1d..97c458c 100644
--- a/src/support/userinfo.cpp
+++ b/src/support/userinfo.cpp
@@ -64,11 +64,12 @@ docstring const user_email()
        //The code after should be used only after user approval.
        return docstring();
 
-       
+#if 0
        string email = getEnv("EMAIL_ADDRESS");
        if (email.empty())
                email = getEnv("EMAIL");
        return from_local8bit(email);
+#endif
 }
 
 } // namespace support