info sort overlay: remove check for unused Labor tab

There hasn't been a LABOR tab sort overlay since 50.12.

The WORK_DETAIL overlay was removed in 4c92876. That commit was part of 50.12-r1~34.
The DF 50.12 release notes say that work detail sorting and searching
was added, and the DFHack 50.12-r1 release notes say that search widgets
were removed for screens that gained native search.

https://store.steampowered.com/news/app/975370/view/4136064865380703752

https://docs.dfhack.org/en/stable/docs/NEWS.html#dfhack-50-12-r1

Author: ChrisJohnsen

plugins/lua/sort/info.lua

@@ -292,8 +292,7 @@ end
 
 function get_panel_offsets()
     local tabs_in_two_rows = is_tabs_in_two_rows()
-    local shift_right = info.current_mode == df.info_interface_mode_type.ARTIFACTS or
-        info.current_mode == df.info_interface_mode_type.LABOR
+    local shift_right = info.current_mode == df.info_interface_mode_type.ARTIFACTS
     local l_offset = (not tabs_in_two_rows and shift_right) and 4 or 0
     local t_offset = 1
     if tabs_in_two_rows then