sky130: remove deprecated LibreLane variables from VHL SCL config.tcl file

sky130/librelane/sky130_fd_sc_hvl/config.tcl

diff --git a/sky130/librelane/sky130_fd_sc_hvl/config.tcl b/sky130/librelane/sky130_fd_sc_hvl/config.tcl
index d8858ee..346ecd0 100644
--- a/sky130/librelane/sky130_fd_sc_hvl/config.tcl
+++ b/sky130/librelane/sky130_fd_sc_hvl/config.tcl
@@ -1,8 +1,4 @@
 set current_folder [file dirname [file normalize [info script]]]
-# Technology lib
-
-set ::env(VDD_PIN_VOLTAGE) "3.30"
-set ::env(GND_PIN_VOLTAGE) "0.00"
 
 # Corners
 set ::env(STA_CORNERS) "\