Removed rshift term to stay in line with serial changes.

src/runner_doiact_vec.c

@@ -871,11 +871,10 @@ void runner_dopair1_density_vec(struct runner *r, struct cell *ci,
       /* Set the cache index. */
       int cj_cache_idx = pjd;
 
-      /*TODO: rshift term. */
       /* Skip this particle if no particle in ci is within range of it. */
       const float hj = cj_cache->h[cj_cache_idx];
       const double dj_test =
-          sort_j[pjd].d - hj * kernel_gamma - dx_max - rshift;
+          sort_j[pjd].d - hj * kernel_gamma - dx_max;
       if (dj_test > di_max) continue;
 
       /* Determine the exit iteration of the interaction loop. */