function removeRewardTokenFromPool(uint256 _pid, IERC20 _rewardToken) public onlyOwner {
require(address(_rewardToken) != address(0), "Invalid rewardToken");

PoolInfo storage pool = poolInfoList[_pid];

// calculate the removing token rewards and transfer to user
address[] memory userList = poolUserList[_pid].values();
for (uint256 i = 0; i < userList.length; i++) {
address userAddr = userList[i];

UserInfo storage user = userInfo[_pid][userAddr];

uint256 _pendingRemovingRewards = getPendingRewardToken(_pid, userAddr, _rewardToken);
if (_pendingRemovingRewards > 0) {

user.rewardDebt[_rewardToken] = user.rewardDebt[_rewardToken] + _pendingRemovingRewards;
totalUserRevenue[_rewardToken] = totalUserRevenue[_rewardToken] + _pendingRemovingRewards;

safeTokenTransfer(_rewardToken, userAddr, _pendingRemovingRewards);
}
}

// find the reward token and remove it
uint256 rewardLength = pool.rewards.length;

for (uint256 i = 0; i < rewardLength; i++) {
if (pool.rewards[i].token == _rewardToken) {
pool.rewards[i] = pool.rewards[rewardLength - 1];
pool.rewards.pop();

rewardTokenSet.remove(address(_rewardToken));
break;
}
}

// update the pool
updatePool(_pid);
}

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