[Cleanup] Remove lc_tx_e type and replace it with lc_tx_t

Same reason as #9264
Signed-off-by: Weicai Yang <weicai@google.com>
diff --git a/hw/ip/lc_ctrl/rtl/lc_ctrl_pkg.sv b/hw/ip/lc_ctrl/rtl/lc_ctrl_pkg.sv
index adb6c90..98cd875 100644
--- a/hw/ip/lc_ctrl/rtl/lc_ctrl_pkg.sv
+++ b/hw/ip/lc_ctrl/rtl/lc_ctrl_pkg.sv
@@ -36,8 +36,7 @@
   typedef enum logic [TxWidth-1:0] {
     On  = 4'b1010,
     Off = 4'b0101
-  } lc_tx_e;
-  typedef logic [TxWidth-1:0] lc_tx_t;
+  } lc_tx_t;
   parameter lc_tx_t LC_TX_DEFAULT = lc_tx_t'(Off);
 
   parameter int RmaSeedWidth = 32;