build: Clean up build_msvc/libsecp256k1_config.h

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`

Author: hebasto

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