[glom] Music Collectio example: Remove singular titles for relationships.

[Murray Cumming <murrayc src gnome org>]

commit ee560b9f120d07e87b7d06628545e344ffbf2143
Author: Murray Cumming <murrayc murrayc com>
Date:   Fri Jun 13 12:28:05 2014 +0200

    Music Collectio example: Remove singular titles for relationships.
    
    They should not have any because there is no time they should be
    needed.

 examples/example_music_collection.glom |    4 ----
 1 files changed, 0 insertions(+), 4 deletions(-)
---
diff --git a/examples/example_music_collection.glom b/examples/example_music_collection.glom
index 6817dd6..1e28382 100644
--- a/examples/example_music_collection.glom
+++ b/examples/example_music_collection.glom
@@ -267,7 +267,6 @@
           <trans loc="sr latin" val="Pesme"/>
           <trans loc="zh_CN" val="歌曲"/>
         </trans_set>
-        <title_singular title="Song"/>
       </relationship>
     </relationships>
     <data_layouts>
@@ -640,7 +639,6 @@
           <trans loc="sr latin" val="Albumi"/>
           <trans loc="zh_CN" val="专辑"/>
         </trans_set>
-        <title_singular title="Album"/>
       </relationship>
     </relationships>
     <data_layouts>
@@ -838,7 +836,6 @@
           <trans loc="sr latin" val="Albumi"/>
           <trans loc="zh_CN" val="专辑"/>
         </trans_set>
-        <title_singular title="Album"/>
       </relationship>
     </relationships>
     <data_layouts>
@@ -1331,7 +1328,6 @@
           <trans loc="sr latin" val="Album"/>
           <trans loc="zh_CN" val="专辑"/>
         </trans_set>
-        <title_singular title="Album"/>
       </relationship>
     </relationships>
     <data_layouts>