Fix lint.

src/mark-compact.cc

Index: src/mark-compact.cc
diff --git a/src/mark-compact.cc b/src/mark-compact.cc
index 97352e69beeef5eb2e6a12dc1f30536cdaef40ae..06cc19ac8eec3215fabdf0c40fc0b1511f308592 100644
--- a/src/mark-compact.cc
+++ b/src/mark-compact.cc
@@ -534,7 +534,6 @@ void MarkCompactCollector::CollectEvacuationCandidates(PagedSpace* space) {
   static const intptr_t kFreenessThreshold = 50;
 
   if (over_reserved >= 2 * space->AreaSize()) {
-
     // If reduction of memory footprint was requested, we are aggressive
     // about choosing pages to free.  We expect that half-empty pages
     // are easier to compact so slightly bump the limit.