Remove unused signal.

hdl/gn4124core/rtl/spartan6/gn4124_core.vhd

@@ -178,7 +178,6 @@ architecture rtl of gn4124_core is
   signal des_pd_data   : std_logic_vector(31 downto 0);
 
   -- Local bus control
-  signal p_wr_rdy    : std_logic;
   signal p2l_rdy_wbm : std_logic;
   signal p2l_rdy_pdm : std_logic;