[turbofan] Remove a DCHECK from the register allocator.

src/compiler/register-allocator.cc

Index: src/compiler/register-allocator.cc
diff --git a/src/compiler/register-allocator.cc b/src/compiler/register-allocator.cc
index fb4d7f9aa1be53372ec8e93860c127c71c18190c..9b01c1515f24cdbcde0e3e4be560b435a69ee56d 100644
--- a/src/compiler/register-allocator.cc
+++ b/src/compiler/register-allocator.cc
@@ -1114,10 +1114,6 @@ void TopLevelLiveRange::AddUseInterval(LifetimePosition start,
       interval->set_next(first_interval_);
       first_interval_ = interval;
     } else {
-      // Order of instruction's processing (see ProcessInstructions) guarantees
-      // that each new use interval either precedes or intersects with
-      // last added interval.
-      DCHECK(start < first_interval_->end());
       first_interval_->set_start(Min(start, first_interval_->start()));
       first_interval_->set_end(Max(end, first_interval_->end()));
     }