sm8450-common: udfps: Revert usage of low brightness

Unfortunately, on devices like cupid the recognition is
significantly worse with this.

Change-Id: I174e3869e86cb19f69e748372941d5065a54b7a7

udfps/UdfpsHandler.cpp

@@ -134,28 +134,12 @@ class XiaomiSm8450UdfpsHander : public UdfpsHandler {
                 mDevice->extCmd(mDevice, COMMAND_FOD_PRESS_STATUS,
                                 pressed ? PARAM_FOD_PRESSED : PARAM_FOD_RELEASED);
 
-                // Get brightness
-                struct disp_brightness_req brightness_req;
-                int brightness = LOW_BRIGHTNESS_THRESHHOLD;
-                brightness_req.base.flag = 0;
-                brightness_req.base.disp_id = MI_DISP_PRIMARY;
-                rc = ioctl(disp_fd_.get(), MI_DISP_IOCTL_GET_BRIGHTNESS, &brightness_req);
-                if (rc) {
-                    LOG(ERROR) << "failed to get brightness, err: " << rc;
-                } else if (brightness_req.brightness > 0) {
-                    brightness = brightness_req.brightness;
-                }
-                LOG(DEBUG) << "brightness is: " << (int)brightness_req.brightness;
-                bool requestLowBrightness = !enrolling && brightness < LOW_BRIGHTNESS_THRESHHOLD;
-
                 // Request HBM
                 disp_local_hbm_req req;
                 req.base.flag = 0;
                 req.base.disp_id = MI_DISP_PRIMARY;
-                req.local_hbm_value =
-                        pressed ? (requestLowBrightness ? LHBM_TARGET_BRIGHTNESS_WHITE_110NIT
-                                                        : LHBM_TARGET_BRIGHTNESS_WHITE_1000NIT)
-                                : LHBM_TARGET_BRIGHTNESS_OFF_FINGER_UP;
+                req.local_hbm_value = pressed ? LHBM_TARGET_BRIGHTNESS_WHITE_1000NIT
+                                              : LHBM_TARGET_BRIGHTNESS_OFF_FINGER_UP;
                 ioctl(disp_fd_.get(), MI_DISP_IOCTL_SET_LOCAL_HBM, &req);
             }
         }).detach();