[generate_lib] Redundant hotfix for 288 with newer open_pdks/volare builds

[hansemro]

Setup:

• sky130 volare build: e6f9c8876da77220403014b116761b0b2d79aab4
• Library Compiler T-2022.03-SP3
• Milkyway T-2022.03-SP3
• Synopsys DC T-2022.03-SP3

Issue:

open_pdks implements a hotfix for swapped nwell/pwell and swapped VNB/VPB in 41e2da101560ea1b890dd9f34f6b5adec5016eea and 8f6aff1881e5feae49acb6d5be53c4acc91bb235.

With these changes, generate_lib.sh no longer needs to apply the hotfix for 288. Hotfixes for 183 in generate_lib.py and generate_lib.sh will still be needed.

Actual issue: applying hotfix again undoes hotfix applied by open_pdks.

[hansemro]

Fixes for recent volare builds can be found in this branch: https://github.com/hansemro/skywater-130nm/commits/update_hotfix