diff --git a/examples/NiO.ctip b/examples/NiO.ctip
deleted file mode 100644
index ea6d12d9a1..0000000000
--- a/examples/NiO.ctip
+++ /dev/null
@@ -1,4 +0,0 @@
-# CTIP potential parameters for Ni-O
-#     X (eV)       J (eV)       gamma (1/ang)       zeta (1/ang)       Z (e)       qmin       qmax       omega
-Ni  -5.840000    14.157390     0.549290            0.000000           0.000000    0.000000   2.000000    100.000
-O    0.000000    15.655862     1.428571            0.000000           0.000000   -2.000000   0.000000    100.000