Remove IsUAHFenableForCurrentBlock

Summary: It's not useful anymore.

Test Plan:
  make check

Reviewers: freetrader, dagurval, kyuupichan, #bitcoin_abc

Reviewed By: kyuupichan, #bitcoin_abc

Differential Revision: https://reviews.bitcoinabc.org/D611

src/test/miner_tests.cpp

@@ -734,8 +734,6 @@ BOOST_AUTO_TEST_CASE(BlockAssembler_construction) {
         pindex = pindex->pprev;
     }
 
-    BOOST_CHECK(IsUAHFenabledForCurrentBlock(config));
-
     // Test around historical 1MB (plus one byte because that's mandatory)
     config.SetMaxBlockSize(ONE_MEGABYTE + 1);
     CheckBlockMaxSize(chainparams, 0, 1000);

src/validation.cpp

@@ -617,11 +617,6 @@ bool IsUAHFenabled(const Config &config, const CBlockIndex *pindexPrev) {
     return IsUAHFenabled(config, pindexPrev->nHeight);
 }
 
-bool IsUAHFenabledForCurrentBlock(const Config &config) {
-    AssertLockHeld(cs_main);
-    return IsUAHFenabled(config, chainActive.Tip());
-}
-
 // Used to avoid mempool polluting consensus critical paths if CCoinsViewMempool
 // were somehow broken and returning the wrong scriptPubKeys
 static bool CheckInputsFromMempoolAndCache(const CTransaction &tx,

src/validation.h

@@ -373,7 +373,6 @@ void PruneBlockFilesManual(int nPruneUpToHeight);
 
 /** Check is UAHF has activated. */
 bool IsUAHFenabled(const Config &config, const CBlockIndex *pindexPrev);
-bool IsUAHFenabledForCurrentBlock(const Config &config);
 
 /** (try to) add transaction to memory pool
  * plTxnReplaced will be appended to with all transactions replaced from mempool