diff --git a/libraries/AP_ADC/keywords.txt b/libraries/AP_ADC/keywords.txt
deleted file mode 100644
index c82cb5d786..0000000000
--- a/libraries/AP_ADC/keywords.txt
+++ /dev/null
@@ -1,3 +0,0 @@
-APM_ADC	KEYWORD1
-Init	KEYWORD2
-Ch	KEYWORD2