Remove unused include in break-alignment-interface (issue 7613048)

[janek . lilypond]

Reviewers: ,

Message:
pushed as bd26755d6208ce93e12d701e9f0b4ac72180bacd, closed

Description:
Remove unused include in break-alignment-interface

Nothing from self-alingnment-interface was used in break alignment,
so no need to include its header.  This patch shouldn't change
anything in Lily behaviour.

Please review this at https://codereview.appspot.com/7613048/

Affected files:
  M lily/break-alignment-interface.cc


Index: lily/break-alignment-interface.cc
diff --git a/lily/break-alignment-interface.cc  
b/lily/break-alignment-interface.cc
index  
242e39eacc7c35692d113ef7ea97d946f0a8da97..8e231cf27179fd9511940c02851f9c8134c1f8fc  
100644
--- a/lily/break-alignment-interface.cc
+++ b/lily/break-alignment-interface.cc
@@ -26,7 +26,6 @@
 #include "output-def.hh"
 #include "paper-column.hh"
 #include "pointer-group-interface.hh"
-#include "self-alignment-interface.hh"
 #include "side-position-interface.hh"
 #include "warn.hh"