quantize_func_test: remove unused macro

`LBD_QUAN_FUNC` was renamed from `LBD_QUAN_FUNC_NO_SKIP`, but the usage
was removed in the same commit:
 6b97198908 Remove obsoleted skip_block for highbd_quantize_b

Change-Id: I0649a60bedc9c40a37ee4ee1aa2699a2cfd2fe53

test/quantize_func_test.cc

diff --git a/test/quantize_func_test.cc b/test/quantize_func_test.cc
index c7c4b83..c047cbc 100644
--- a/test/quantize_func_test.cc
+++ b/test/quantize_func_test.cc
@@ -49,10 +49,6 @@
 
 #undef LP_QUANTIZE_PARAM_LIST
 
-#define LBD_QUAN_FUNC                                                      \
-  fn(coeff_ptr, n_coeffs, zbin_ptr, round_ptr, quant_ptr, quant_shift_ptr, \
-     qcoeff_ptr, dqcoeff_ptr, dequant_ptr, eob_ptr, scan, iscan)
-
 #if CONFIG_AV1_HIGHBITDEPTH
 #define HBD_QUAN_FUNC                                                      \
   fn(coeff_ptr, n_coeffs, zbin_ptr, round_ptr, quant_ptr, quant_shift_ptr, \