minor cleanup: remove unnecessary variable

src/policy/fees.cpp

@@ -487,9 +487,8 @@ CBlockPolicyEstimator::CBlockPolicyEstimator()
     : nBestSeenHeight(0), firstRecordedHeight(0), historicalFirst(0), historicalBest(0), trackedTxs(0), untrackedTxs(0)
 {
     static_assert(MIN_BUCKET_FEERATE > 0, "Min feerate must be nonzero");
-    minTrackedFee = CFeeRate(MIN_BUCKET_FEERATE);
     size_t bucketIndex = 0;
-    for (double bucketBoundary = minTrackedFee.GetFeePerK(); bucketBoundary <= MAX_BUCKET_FEERATE; bucketBoundary *= FEE_SPACING, bucketIndex++) {
+    for (double bucketBoundary = MIN_BUCKET_FEERATE; bucketBoundary <= MAX_BUCKET_FEERATE; bucketBoundary *= FEE_SPACING, bucketIndex++) {
         buckets.push_back(bucketBoundary);
         bucketMap[bucketBoundary] = bucketIndex;
     }

src/policy/fees.h

@@ -177,7 +177,6 @@ public:
     void FlushUnconfirmed(CTxMemPool& pool);
 
 private:
-    CFeeRate minTrackedFee;    //!< Passed to constructor to avoid dependency on main
     unsigned int nBestSeenHeight;
     unsigned int firstRecordedHeight;
     unsigned int historicalFirst;