Revert "Add regtest for issue 1440"

This reverts commit 713aeac92c2bd06a9ae0ed38d13f4b20fba3f9a8.

This file breaks compiling for some reason.

diff --git a/input/regression/book-label-no-segfault.ly b/input/regression/book-label-no-segfault.ly
deleted file mode 100644 (file)
index f8ca155..0000000
--- a/input/regression/book-label-no-segfault.ly
+++ /dev/null
@@ -1,9 +0,0 @@
-\version "2.13.43"
-
-\header {
-  texidoc = "
-A book(part) can contain only a label without causing a segfault.
-"
-}
-
-\book { \label #'foo }