diff --git a/notebook/assets/lang.lilypond/chords-systems.count b/notebook/assets/lang.lilypond/chords-systems.count
deleted file mode 100644
index 56a6051..0000000
--- a/notebook/assets/lang.lilypond/chords-systems.count
+++ /dev/null
@@ -1 +0,0 @@
-1
\ No newline at end of file
diff --git a/notebook/assets/lang.lilypond/chords-systems.texi b/notebook/assets/lang.lilypond/chords-systems.texi
deleted file mode 100644
index cbe3587..0000000
--- a/notebook/assets/lang.lilypond/chords-systems.texi
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@@ -1,2 +0,0 @@
-@image{chords-1}
-@c eof
diff --git a/notebook/assets/lang.lilypond/chords.png b/notebook/assets/lang.lilypond/chords.png
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diff --git a/notebook/assets/lang.lilypond/notes-systems.count b/notebook/assets/lang.lilypond/notes-systems.count
deleted file mode 100644
index 56a6051..0000000
--- a/notebook/assets/lang.lilypond/notes-systems.count
+++ /dev/null
@@ -1 +0,0 @@
-1
\ No newline at end of file
diff --git a/notebook/assets/lang.lilypond/notes-systems.texi b/notebook/assets/lang.lilypond/notes-systems.texi
deleted file mode 100644
index 4e26702..0000000
--- a/notebook/assets/lang.lilypond/notes-systems.texi
+++ /dev/null
@@ -1,2 +0,0 @@
-@image{notes-1}
-@c eof
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diff --git a/notebook/assets/text.lilypond/chords.png b/notebook/assets/text.lilypond/chords.png
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diff --git a/notebook/assets/text.lilypond/notes.png b/notebook/assets/text.lilypond/notes.png
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