Merge bitcoin#25496: build: Clean up build_msvc/libsecp256k1_config.h

1d1546e build: Clean up `build_msvc/libsecp256k1_config.h` (Hennadii Stepanov)

Pull request description:

  Unused since bitcoin#19944:
  - `USE_FIELD_10X26`
  - `USE_FIELD_5X52`
  - `USE_SCALAR_4X64`
  - `USE_SCALAR_8X32`

  Unused since bitcoin#20147:
  - `USE_ENDOMORPHISM`

  Unused since bitcoin#21573:
  - `USE_FIELD_INV_BUILTIN`
  - `USE_FIELD_INV_NUM`
  - `USE_NUM_GMP`
  - `USE_NUM_NONE`
  - `USE_SCALAR_INV_BUILTIN`
  - `USE_SCALAR_INV_NUM`

ACKs for top commit:
  sipa:
    utACK 1d1546e (if CI is happy)

Tree-SHA512: 7c4946c1bddd86cb71ea5c881aca94c1e4be3fc7ebd26962f025c65acdff65937e8c51ff6e87a89f9c0c0c59fef8285fc16f63b912ce2a4e76f8ca01fd4c4522

Author: MacroFake

build_msvc/libsecp256k1_config.h

@@ -8,23 +8,6 @@
 #define BITCOIN_LIBSECP256K1_CONFIG_H
 
 #undef USE_ASM_X86_64
-#undef USE_ENDOMORPHISM
-#undef USE_FIELD_10X26
-#undef USE_FIELD_5X52
-#undef USE_FIELD_INV_BUILTIN
-#undef USE_FIELD_INV_NUM
-#undef USE_NUM_GMP
-#undef USE_NUM_NONE
-#undef USE_SCALAR_4X64
-#undef USE_SCALAR_8X32
-#undef USE_SCALAR_INV_BUILTIN
-#undef USE_SCALAR_INV_NUM
-
-#define USE_NUM_NONE 1
-#define USE_FIELD_INV_BUILTIN 1
-#define USE_SCALAR_INV_BUILTIN 1
-#define USE_FIELD_10X26 1
-#define USE_SCALAR_8X32 1
 
 #define ECMULT_GEN_PREC_BITS 4
 #define ECMULT_WINDOW_SIZE 15