Liberty timing file for sky130_fd_sc_hs__tt_025C_1v80 without ccsnoise data

[wenbodd]

Expected Behavior

After running make timing, I want to get a clean sky130_fd_sc_hs__tt_025C_1v80.lib that does not contain ccsnoise data in it.

Actual Behavior

The generated sky130_fd_sc_hstt_025C_1v80.lib still has ccsnoise data like ccsn_dc or ccsn_ovrf in it. The current hs lib only has `*tt_025C_1v80_ccsnoise.lib.json` for each cell, for example the a2111o cell:

sky130_fd_sc_hs__a2111o_1__tt_025C_1v20.lib.json
sky130_fd_sc_hs__a2111o_1__tt_025C_1v35.lib.json
sky130_fd_sc_hs__a2111o_1__tt_025C_1v44.lib.json
sky130_fd_sc_hs__a2111o_1__tt_025C_1v50.lib.json
sky130_fd_sc_hs__a2111o_1__tt_025C_1v62.lib.json
sky130_fd_sc_hs__a2111o_1__tt_025C_1v68.lib.json
sky130_fd_sc_hs__a2111o_1__tt_025C_1v80_ccsnoise.lib.json
sky130_fd_sc_hs__a2111o_1__tt_025C_1v89.lib.json
sky130_fd_sc_hs__a2111o_1__tt_025C_2v10.lib.json
sky130_fd_sc_hs__a2111o_1__tt_100C_1v80.lib.json
sky130_fd_sc_hs__a2111o_1__tt_150C_1v80.lib.json

Steps to Reproduce the Problem

1. make timing
2. Check the sky130_fd_sc_hs__tt_025C_1v80.lib under the timing folder

Specifications

• Version: commit 1d051f49bfe4e2fe9108d702a8bc2e9c081005a4
• Platform: sky130_fd_sc_hs

[msaligane]

I think this is related to #77