Get rid of the unused Priority argument to QuicUtils::FindMutualTag. No behavior change.

net/quic/core/quic_utils.h

Index: net/quic/core/quic_utils.h
diff --git a/net/quic/core/quic_utils.h b/net/quic/core/quic_utils.h
index 66b338ab7513ac636b507cbf79b0bca3c9d163c9..151841cdc03c837a4f1124515dcca6ddaf60f54b 100644
--- a/net/quic/core/quic_utils.h
+++ b/net/quic/core/quic_utils.h
@@ -32,11 +32,6 @@ namespace net {
 
 class NET_EXPORT_PRIVATE QuicUtils {
  public:
-  enum Priority {
-    LOCAL_PRIORITY,
-    PEER_PRIORITY,
-  };
-
   // Returns the 64 bit FNV1a hash of the data.  See
   // http://www.isthe.com/chongo/tech/comp/fnv/index.html#FNV-param
   static uint64_t FNV1a_64_Hash(const char* data, int len);
@@ -56,14 +51,11 @@ class NET_EXPORT_PRIVATE QuicUtils {
   // is also in the other list and returns true. If there is no intersection it
   // returns false.
   //
-  // Which list has priority is determined by |priority|.
-  //
   // If |out_index| is non-nullptr and a match is found then the index of that
   // match in |their_tags| is written to |out_index|.
   static bool FindMutualTag(const QuicTagVector& our_tags,
                             const QuicTag* their_tags,
                             size_t num_their_tags,
-                            Priority priority,
                             QuicTag* out_result,
                             size_t* out_index);