[LyX/master] Remove dead code

[Jean-Marc]

commit 1d9c2daede2d080d74bf57d261707dc651f746d9
Author: Jean-Marc <lasgout...@lyx.org>
Date:   Sat Sep 12 18:29:02 2015 +0200

    Remove dead code
    
    first is always false at this point.
    
    Coverity issue 23298.

diff --git a/src/Layout.cpp b/src/Layout.cpp
index 17be45c..0fdb341 100644
--- a/src/Layout.cpp
+++ b/src/Layout.cpp
@@ -1265,8 +1265,6 @@ void Layout::write(ostream & os) const
                bool first = true;
                os << "\tAlignPossible";
                if (alignpossible & LYX_ALIGN_BLOCK) {
-                       if (!first)
-                               os << ',';
                        os << " Block";
                        first = false;
                }