diff --git a/README.md b/README.md
index 1e03adc..f6b6a38 100644
--- a/README.md
+++ b/README.md
@@ -339,14 +339,11 @@ After changing any IMU conversion, calibration, timing, or report packing:
 5. Inject a known single-axis gyro rate and decode the packed quaternion. The corresponding component must change smoothly with the expected sign.
 6. Perform the decisive end-to-end check: genuine Pro Controller → SDL3 bridge → UART → emulated Pico → Zelda. This path was confirmed correct after the mode-2 fix.
 
-The quaternion implementation is adapted from HOJA's `NS-LIB-HID` and retains its CC BY-NC 4.0 attribution in `switch_pro_driver.cpp`.
-
 ## References
 - GP2040-CE (controller firmware ecosystem): https://github.com/OpenStickCommunity/GP2040-CE
 - nxbt (Switch controller research/tools): https://github.com/Brikwerk/nxbt
 - Nintendo Switch Reverse Engineering notes: https://github.com/dekuNukem/Nintendo_Switch_Reverse_Engineering
 - `hid-nintendo` driver reference: https://github.com/DanielOgorchock/linux/blob/ogorchock/drivers/hid/hid-nintendo.c
-- HOJA `NS-LIB-HID` mode-2 reference: https://github.com/HandHeldLegend/NS-LIB-HID
 
 ## Troubleshooting
 - **No input on Switch**: verify UART wiring (Pico GPIO4/5), baud matches both sides, Pico flashed with current firmware, and `Pro Controller Wired Communication` is enabled on the Switch.
diff --git a/switch_pro_driver.cpp b/switch_pro_driver.cpp
index c2a933c..4d26922 100644
--- a/switch_pro_driver.cpp
+++ b/switch_pro_driver.cpp
@@ -197,9 +197,6 @@ static std::map<uint32_t, const uint8_t*> spi_flash_data = {
 
 static inline uint16_t scale16To12(uint16_t pos) { return pos >> 4; }
 
-// Quaternion IMU mode 2 is adapted from HandHeldLegend/NS-LIB-HID
-// (ns_lib_motion.*, 2026, Mitchell Cairns / Hand Held Legend, LLC),
-// licensed CC BY-NC 4.0: https://creativecommons.org/licenses/by-nc/4.0/
 struct MotionQuaternion {
     float x;
     float y;