fix translation

Author: Aed-1

gui/public/i18n/en/translation.ftl

@@ -1370,8 +1370,6 @@ firmware_tool-add_imus_step-imu_type-placeholder = Select the type of IMU
 firmware_tool-add_imus_step-imu_rotation-tooltip = Click to open documentation
 firmware_tool-add_imus_step-imu_rotation-tooltip-label = IMU Rotation (Degree)
 firmware_tool-add_imus_step-imu_rotation-tooltip-placeholder = IMU Rotation (Degree)
-    .label = IMU Rotation (deg)
-    .placeholder = Rotation angle of the IMU
 firmware_tool-add_imus_step-scl_pin =
     .label = SCL Pin
     .placeholder = Pin address of SCL