Remove a redundant practracker exception line in maint-0.4.1

This will our "git push" hook not complain about pushing from
maint-0.4.1.

scripts/maint/practracker/exceptions.txt

@@ -88,7 +88,6 @@ problem function-size /src/core/or/circuitlist.c:circuits_handle_oom() 117
 problem function-size /src/core/or/circuitmux.c:circuitmux_set_policy() 110
 problem function-size /src/core/or/circuitmux.c:circuitmux_attach_circuit() 114
 problem file-size /src/core/or/circuitpadding.c 3040
-problem function-size /src/core/or/circuitpadding.c:circpad_machine_schedule_padding() 107
 problem function-size /src/core/or/circuitpadding.c:circpad_machine_schedule_padding() 113 
 problem function-size /src/core/or/circuitpadding_machines.c:circpad_machine_relay_hide_intro_circuits() 104
 problem function-size /src/core/or/circuitpadding_machines.c:circpad_machine_client_hide_rend_circuits() 112