Update AVX2 sum function

Author: nicodr97

source/Platform/x86/AVX2.cpp

@@ -109,15 +109,6 @@ class AVX2Vector {
   inline uint16_t sum() const {
     __m256i sum256 = _mm256_sad_epu8(vector, _mm256_setzero_si256());
     __m128i sum128 = _mm_add_epi64(_mm256_extractf128_si256(sum256, 1), _mm256_castsi256_si128(sum256));
-    uint16_t res32 = _mm_extract_epi32(sum128, 0) + _mm_extract_epi32(sum128, 2);
-    uint16_t res64 = _mm_extract_epi64(sum128, 0) + _mm_extract_epi64(sum128, 1);
-    if (res32 != res64) {
-      std::cout << "uint16_t res32 = " << res32 << "\n";
-      std::cout << "uint16_t res64 = " << res64 << "\n";
-      exit (1);
-    }
-
-
     return _mm_extract_epi64(sum128, 0) + _mm_extract_epi64(sum128, 1);
   }
 #else