build: Clean up build_msvc/libsecp256k1_config.h #25496

1. 
   hebasto commented at 9:50 pm on June 28, 2022: member

   Unused since bitcoin/bitcoin#19944:

   • USE_FIELD_10X26
   • USE_FIELD_5X52
   • USE_SCALAR_4X64
   • USE_SCALAR_8X32

   Unused since bitcoin/bitcoin#20147:

   • USE_ENDOMORPHISM

   Unused since bitcoin/bitcoin#21573:

   • USE_FIELD_INV_BUILTIN
   • USE_FIELD_INV_NUM
   • USE_NUM_GMP
   • USE_NUM_NONE
   • USE_SCALAR_INV_BUILTIN
   • USE_SCALAR_INV_NUM
2. build: Clean up `build_msvc/libsecp256k1_config.h`

   Unused since bitcoin/bitcoin#19944:
   - `USE_FIELD_10X26`
   - `USE_FIELD_5X52`
   - `USE_SCALAR_4X64`
   - `USE_SCALAR_8X32`
   
   Unused since bitcoin/bitcoin#20147:
   - `USE_ENDOMORPHISM`
   
   Unused since bitcoin/bitcoin#21573:
   - `USE_FIELD_INV_BUILTIN`
   - `USE_FIELD_INV_NUM`
   - `USE_NUM_GMP`
   - `USE_NUM_NONE`
   - `USE_SCALAR_INV_BUILTIN`
   - `USE_SCALAR_INV_NUM`

   1d1546e4c2
3. hebasto added the label Windows on Jun 28, 2022
4. hebasto added the label Build system on Jun 28, 2022
5. 
   sipa commented at 10:36 pm on June 28, 2022: member

   utACK 1d1546e4c270bd7f2b29a18d39eee4db48447248 (if CI is happy)
6. MarcoFalke merged this on Jun 29, 2022
7. MarcoFalke closed this on Jun 29, 2022

   ---

8. hebasto deleted the branch on Jun 29, 2022
9. sidhujag referenced this in commit 30fc0ceef5 on Jun 29, 2022
10. DrahtBot locked this on Jun 29, 2023

Contributors
hebasto sipa

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Windows Build system