Remove unnecessary field from SFCState

Author: thaarok

contracts/sfc/SFC.sol

@@ -331,8 +331,6 @@ contract SFC is SFCBase, Version {
         }
 
         snapshot.epochFee = ctx.epochFee;
-        snapshot.totalBaseRewardWeight = ctx.totalBaseRewardWeight;
-        snapshot.totalTxRewardWeight = ctx.totalTxRewardWeight;
         if (totalSupply > snapshot.epochFee) {
             totalSupply -= snapshot.epochFee;
         } else {

contracts/sfc/SFCLib.sol

@@ -316,7 +316,6 @@ contract SFCLib is SFCBase {
         uint256 penalty = getSlashingPenalty(amount, isCheater, slashingRefundRatio[toValidatorID]);
         delete getWithdrawalRequest[delegator][toValidatorID][wrID];
 
-        totalSlashedStake += penalty;
         if (amount <= penalty) {
             revert StakeIsFullySlashed();
         }

contracts/sfc/SFCState.sol

@@ -40,8 +40,6 @@ contract SFCState is Initializable, Ownable {
     uint256 public totalStake;
     // total stake of active (OK_STATUS) validators (total weight)
     uint256 public totalActiveStake;
-    // sum of penalties subtracted from successful withdrawals - TODO misleading - remove?
-    uint256 public totalSlashedStake;
 
     // delegator => validator ID => stashed rewards (to be claimed/restaked)
     mapping(address => mapping(uint256 => Rewards)) internal _rewardsStash;
@@ -88,8 +86,6 @@ contract SFCState is Initializable, Ownable {
         uint256 endTime;
         uint256 endBlock;
         uint256 epochFee; // gas fees from txs in the epoch
-        uint256 totalBaseRewardWeight; // sum( stake * uptimeRatio ^ 2 ) TODO write only - remove?
-        uint256 totalTxRewardWeight; // sum( originatedTxsFee * uptimeRatio ) TODO write only - remove?
         uint256 baseRewardPerSecond; // the base reward to divide among validators for each second of the epoch
         uint256 totalStake; // total weight of all validators
         uint256 totalSupply; // total supply of native tokens

contracts/test/UnitTestSFC.sol

@@ -125,8 +125,6 @@ interface SFCUnitTestI {
             uint256 endTime,
             uint256 endBlock,
             uint256 epochFee,
-            uint256 totalBaseRewardWeight,
-            uint256 totalTxRewardWeight,
             uint256 _baseRewardPerSecond,
             uint256 totalStake,
             uint256 totalSupply