Remove quiet history pruning depth limit

src/search.cpp

@@ -905,7 +905,7 @@ Value Search::Worker::search(
                   + thisThread->pawnHistory[pawn_structure_index(pos)][movedPiece][move.to_sq()];
 
                 // Continuation history based pruning (~2 Elo)
-                if (lmrDepth < 7 && history < -3653 * depth)
+                if (history < -3653 * depth)
                     continue;
 
                 history += 2 * thisThread->mainHistory[us][move.from_to()];