Remove relaying of double-spends

src/main.h

@@ -189,9 +189,6 @@ extern CBlockIndex *pindexBestHeader;
 /** Minimum disk space required - used in CheckDiskSpace() */
 static const uint64_t nMinDiskSpace = 52428800;
 
-/** Initialize respend bloom filter **/
-void InitRespendFilter();
-
 /** Pruning-related variables and constants */
 /** True if any block files have ever been pruned. */
 extern bool fHavePruned;