Remove unused STD_LOGIC_UNSIGNED package.

libraries/technology/transceiver/tech_transceiver_gx.vhd

@@ -22,7 +22,6 @@
 
 LIBRARY IEEE, technology_lib, common_lib, dp_lib;
 USE IEEE.STD_LOGIC_1164.ALL;
-USE IEEE.STD_LOGIC_UNSIGNED.ALL;
 USE work.tech_transceiver_component_pkg.ALL;
 USE technology_lib.technology_pkg.ALL;
 USE technology_lib.technology_select_pkg.ALL;