[libc-commits] [libc] [libc][NFC] remove staled header libraries (PR #192656)

[Schrodinger ZHU Yifan via libc-commits]

================
@@ -105,15 +105,6 @@ add_header_library(
     libc.hdr.stdint_proxy
 )
 
-add_header_library(
----------------
SchrodingerZhu wrote:

I think `CPP.bit` is used but not this one
```
~/Documents/llvm-project libc/fix-staled-header-library
❯ rg  __support/CPP/bit libc | wc -l
137

~/Documents/llvm-project libc/fix-staled-header-library
❯ rg  __support/bit libc | wc -l
0
```

https://github.com/llvm/llvm-project/pull/192656