drm/amd/display: Remove unused duplicate register definition

[Why]
DCN32 uses ABM register definitions in dcn32_resource.h, remove
duplicate from dce_abm.h to avoid confusion.
Reviewed-by: Dillon Varone <dillon.varone@amd.com>
Acked-by: Hersen Wu <hersenxs.wu@amd.com>
Signed-off-by: Joshua Aberback <joshua.aberback@amd.com>
Signed-off-by: Hersen Wu <hersenxs.wu@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dce/dce_abm.h

@@ -128,21 +128,6 @@
 	SRI(DC_ABM1_ACE_THRES_12, ABM, id), \
 	NBIO_SR(BIOS_SCRATCH_2)
 
-#define ABM_DCN32_REG_LIST(id)\
-	SRI(DC_ABM1_HG_SAMPLE_RATE, ABM, id), \
-	SRI(DC_ABM1_LS_SAMPLE_RATE, ABM, id), \
-	SRI(BL1_PWM_BL_UPDATE_SAMPLE_RATE, ABM, id), \
-	SRI(DC_ABM1_HG_MISC_CTRL, ABM, id), \
-	SRI(DC_ABM1_IPCSC_COEFF_SEL, ABM, id), \
-	SRI(BL1_PWM_CURRENT_ABM_LEVEL, ABM, id), \
-	SRI(BL1_PWM_TARGET_ABM_LEVEL, ABM, id), \
-	SRI(BL1_PWM_USER_LEVEL, ABM, id), \
-	SRI(DC_ABM1_LS_MIN_MAX_PIXEL_VALUE_THRES, ABM, id), \
-	SRI(DC_ABM1_HGLS_REG_READ_PROGRESS, ABM, id), \
-	SRI(DC_ABM1_ACE_OFFSET_SLOPE_0, ABM, id), \
-	SRI(DC_ABM1_ACE_THRES_12, ABM, id), \
-	NBIO_SR(BIOS_SCRATCH_2)
-
 #define ABM_SF(reg_name, field_name, post_fix)\
 	.field_name = reg_name ## __ ## field_name ## post_fix