diff --git a/libraries/AP_OpticalFlow/keywords.txt b/libraries/AP_OpticalFlow/keywords.txt
deleted file mode 100644
index 226c8a217b..0000000000
--- a/libraries/AP_OpticalFlow/keywords.txt
+++ /dev/null
@@ -1,26 +0,0 @@
-AP_OpticalFlow	KEYWORD1
-AP_OpticalFlow_ADNS3080	KEYWORD1
-AP_OpticalFlow_ADNS3080_APM2	KEYWORD1
-init	KEYWORD2
-read	KEYWORD2
-update	KEYWORD2
-read_register	KEYWORD2
-write_register	KEYWORD2
-reset	KEYWORD2
-motion	KEYWORD2
-get_led_always_on	KEYWORD2
-set_led_always_on	KEYWORD2
-get_resolution	KEYWORD2
-set_resolution	KEYWORD2
-get_frame_rate_auto	KEYWORD2
-set_frame_rate_auto	KEYWORD2
-get_frame_period	KEYWORD2
-set_frame_period	KEYWORD2
-get_frame_rate	KEYWORD2
-set_frame_rate	KEYWORD2
-get_shutter_speed_auto	KEYWORD2
-set_shutter_speed_auto	KEYWORD2
-get_shutter_speed	KEYWORD2
-set_shutter_speed	KEYWORD2
-clear_motion	KEYWORD2
-print_pixel_data	KEYWORD2
\ No newline at end of file