Remove dead remove_constraints placeholder blocks from SDC tests

The remove_constraints API was permanently removed from Sta.
Delete the commented-out calls, TODO comments, and "skipped"
print statements instead of keeping placeholder blocks.

Co-Authored-By: Claude <noreply@anthropic.com>
Signed-off-by: Jaehyun Kim <jhkim@precisioninno.com>

sdc/test/sdc_exception_merge_priority.ok

@@ -1094,8 +1094,6 @@ Path Type: max
            7.89   slack (MET)
 
 
---- remove_constraints ---
-remove_constraints: skipped (API removed)
 Startpoint: reg2 (rising edge-triggered flip-flop clocked by clk1)
 Endpoint: out1 (output port clocked by clk1)
 Path Group: grp1

sdc/test/sdc_exception_merge_priority.tcl

@@ -115,13 +115,6 @@ puts "--- exception override: false path then max_delay ---"
 set_max_delay -from [get_ports in3] -to [get_ports out2] 5.0
 report_checks
 
-# remove_constraints (remove all SDC constraints)
-puts "--- remove_constraints ---"
-# TODO: sta::remove_constraints removed from Sta API
-# sta::remove_constraints
-# report_checks
-puts "remove_constraints: skipped (API removed)"
-
 # Re-add constraints for write_sdc
 create_clock -name clk1 -period 10 [get_ports clk1]
 create_clock -name clk2 -period 20 [get_ports clk2]

sdc/test/sdc_filter_query.ok

@@ -29,5 +29,4 @@ filter_insts ref_name =~ BUF*: 1
 filter_pins direction == input: 1
 filter_nets full_name =~ n*: 7
 No differences found.
-remove_constraints: skipped (API removed)
 No differences found.

sdc/test/sdc_filter_query.tcl

@@ -13,7 +13,7 @@
 #     net_is_constrained, is_clock_src, is_clock, is_ideal_clock,
 #     clk_thru_tristate_enabled, set_clk_thru_tristate_enabled,
 #     find_clocks_matching, default_arrival_clock,
-#     pin_case_logic_value, pin_logic_value, remove_constraints
+#     pin_case_logic_value, pin_logic_value
 source ../../test/helpers.tcl
 
 read_liberty ../../test/nangate45/Nangate45_typ.lib
@@ -179,14 +179,6 @@ diff_files sdc_filter_query1.sdcok $sdc1
 unset_case_analysis [get_ports in1]
 unset_case_analysis [get_ports in2]
 
-############################################################
-# remove_constraints
-############################################################
-# TODO: sta::remove_constraints removed from Sta API
-# sta::remove_constraints
-# report_checks
-puts "remove_constraints: skipped (API removed)"
-
 ############################################################
 # Re-apply constraints for final write
 ############################################################