Remove unused code

code/matrix_multiplication.h

@@ -100,11 +100,9 @@ void matrixMultiplyAVX2(const std::complex<float>* a,
   __m256 b_2 = _mm256_permutevar8x32_ps(b_m, b_2_ind);
 
   __m256 a_3 = _mm256_permutevar8x32_ps(a_m, a_3_ind);
-  __m256 a_3_inv = _mm256_mul_ps(a_3, inv);
   __m256 b_3 = _mm256_permutevar8x32_ps(b_m, b_3_ind);
 
   __m256 a_4 = _mm256_permutevar8x32_ps(a_m, a_4_ind);
-  __m256 a_4_inv = _mm256_mul_ps(a_4, inv);
   __m256 b_4 = _mm256_permutevar8x32_ps(b_m, b_4_ind);
 
   __m256 c_p1 = _mm256_fmaddsub_ps(a_1, b_1, _mm256_mul_ps(a_3, b_3));