Remove old unused file

diff --git a/Documentation/user/dummy-interfaces.itexi b/Documentation/user/dummy-interfaces.itexi
deleted file mode 100644 (file)
index ee79458..0000000
--- a/Documentation/user/dummy-interfaces.itexi
+++ /dev/null
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-
-@node Full Grob interface list
-@unnumbered Full Grob interface list
-
-The automatic documentation failed to build.
-Visit @uref{http://@/www@/.lilypond@/.nl/@doc/@/v2.5,prebuilt LilyPond Documentation online}.