Remove function SimdHogExtractFeatures

[ermig1979]

Remove deprecated SimdHogExtractFeatures and its C++ wrapper Simd::HogExtractFeatures.

Changes

• Remove the C API from SimdLib.h / SimdLib.cpp.
• Remove the C++ wrapper from SimdLib.hpp.
• Remove Base, SSE4.1, AVX2, AVX-512BW, NEON, and SVE2 implementations, including class HogFeatureExtractor.
• Remove AVX-512BW CovertDifference and SVE2 HogTailMask / HogDifferenceLo / HogDifferenceHi, which were only used by HogExtractFeatures.
• Keep other Hog APIs (HogDeinterleave, HogFilterSeparable) and their *Hog.cpp translation units.
• Remove HogExtractFeatures auto-tests from TestHog.cpp / Test.cpp.
• Update release notes for 7.2.166 in docs/2026.html.

Python wrapper / VS2022

• The Python wrapper does not expose SimdHogExtractFeatures, so py/SimdPy is unchanged.
• prj/vs2022 project files are unchanged because Hog source files still contain HogDeinterleave and HogFilterSeparable.

Testing

Release CMake build with g++ (-DSIMD_SHARED=ON):

• nm -D libSimd.so exports SimdHogDeinterleave and SimdHogFilterSeparable only (SimdHogExtractFeatures is gone).
• ./Test "-r=.." -fi=Hog -tt=1 -ts=1 passed (HogDeinterleave, HogFilterSeparable).
• ./Test "-r=.." -fi=HogExtractFeatures reports no matching tests.
• ./Test "-r=.." -fi=Sobel -tt=1 -ts=1 passed.
• python3 ./Test.py -r=.. -i PrintInfo and -i ImageFill completed successfully.
• GitHub CI: build_and_test_gcc_new and build_and_test_arm64 succeeded.