camerad: remove unused macros and global (#21970)

selfdrive/camerad/cameras/camera_common.h

@@ -34,10 +34,6 @@
 #define LOG_CAMERA_ID_QCAMERA 3
 #define LOG_CAMERA_ID_MAX 4
 
-#define HLC_THRESH 222
-#define HLC_A 80
-#define HISTO_CEIL_K 5
-
 const bool env_send_driver = getenv("SEND_DRIVER") != NULL;
 const bool env_send_road = getenv("SEND_ROAD") != NULL;
 const bool env_send_wide_road = getenv("SEND_WIDE_ROAD") != NULL;

selfdrive/camerad/cameras/camera_qcom2.cc

@@ -55,9 +55,6 @@ const int ANALOG_GAIN_MAX_IDX = 0xD; // 4.0x
 const int EXPOSURE_TIME_MIN = 2; // with HDR, fastest ss
 const int EXPOSURE_TIME_MAX = 1904; // with HDR, slowest ss
 
-// global var for AE ops
-std::atomic<CameraExpInfo> cam_exp[3] = {{{0}}};
-
 // ************** low level camera helpers ****************
 int cam_control(int fd, int op_code, void *handle, int size) {
   struct cam_control camcontrol = {0};