Remove leftover pin declarations in a clamped pad

sky130/custom/sky130_fd_io/verilog/sky130_ef_io.v

diff --git a/sky130/custom/sky130_fd_io/verilog/sky130_ef_io.v b/sky130/custom/sky130_fd_io/verilog/sky130_ef_io.v
index b3ccc11..aa9f681 100644
--- a/sky130/custom/sky130_fd_io/verilog/sky130_ef_io.v
+++ b/sky130/custom/sky130_fd_io/verilog/sky130_ef_io.v
@@ -912,8 +912,6 @@
   inout AMUXBUS_A;
   inout AMUXBUS_B;
 
-  inout DRN_HVC;
-  inout SRC_BDY_HVC;
   inout VDDIO;	
   inout VDDIO_Q;	
   inout VDDA;