remove temporary Poison status

include/rocksdb/db.h

@@ -1305,9 +1305,6 @@ class DB {
     // families that were deleted as a result of ApplyReplicationLogRecord()
     // call, if any.
     std::vector<uint32_t> deleted_column_families;
-
-    // record number of mismatched epoch number found
-    uint64_t mismatched_epoch_num{0};
   };
   // ApplyReplicationLogRecord() applies the replication record provided by the
   // leader's ReplicationLogListener. Info contains some useful information

include/rocksdb/status.h

@@ -89,8 +89,6 @@ class Status {
     kTryAgain = 13,
     kCompactionTooLarge = 14,
     kColumnFamilyDropped = 15,
-    // Temporary status code for rocksdb upgrade
-    kPoison = 100,
     kMaxCode
   };
 
@@ -179,9 +177,6 @@ class Status {
   static Status Corruption(SubCode msg = kNone) {
     return Status(kCorruption, msg);
   }
-  static Status Poison(const Slice& msg, const Slice& msg2 = Slice()) {
-    return Status(kPoison, msg, msg2);
-  }
 
   static Status NotSupported(const Slice& msg, const Slice& msg2 = Slice()) {
     return Status(kNotSupported, msg, msg2);
@@ -317,11 +312,6 @@ class Status {
     return code() == kCorruption;
   }
 
-  bool IsPoison() const {
-    MarkChecked();
-    return code() == kPoison;
-  }
-
   // Returns true iff the status indicates a NotSupported error.
   bool IsNotSupported() const {
     MarkChecked();

util/status.cc

@@ -132,9 +132,6 @@ std::string Status::ToString() const {
     case kMaxCode:
       assert(false);
       break;
-    case kPoison:
-      type = "Poison: ";
-      break;
   }
   char tmp[30];
   if (type == nullptr) {