mac: Prepare for -Wunused-functions.

cc/resources/tile_priority.cc

Index: cc/resources/tile_priority.cc
diff --git a/cc/resources/tile_priority.cc b/cc/resources/tile_priority.cc
index eeb87cdcbbc63d1ae89a74a9538961aac6eb74a1..9cf4634f7d5da1cb3a1204c1afd17c3e04c775b6 100644
--- a/cc/resources/tile_priority.cc
+++ b/cc/resources/tile_priority.cc
@@ -18,14 +18,6 @@ struct Range {
   float end_;
 };
 
-inline bool Intersects(const Range& a, const Range& b) {
-  return a.start_ < b.end_ && b.start_ < a.end_;
-}
-
-inline Range Intersect(const Range& a, const Range& b) {
-  return Range(std::max(a.start_, b.start_), std::min(a.end_, b.end_));
-}
-
 bool Range::IsEmpty() {
   return start_ >= end_;
 }