fix: remove unused and error txid in trigger smart

[waynercheung]

What does this PR do?
remove unused and error txid in trigger smart contract

Why are these changes required?

This PR has been tested by:

• Unit Tests
• Manual Testing

Follow up

Extra details

[codecov-io]

Codecov Report

Merging #2009 into develop will increase coverage by 0.02%.
The diff coverage is n/a.

@@              Coverage Diff              @@
##             develop    #2009      +/-   ##
=============================================
+ Coverage      44.75%   44.78%   +0.02%     
- Complexity      4029     4032       +3     
=============================================
  Files            489      489              
  Lines          28833    28832       -1     
  Branches        3007     3007              
=============================================
+ Hits           12905    12913       +8     
+ Misses         14775    14767       -8     
+ Partials        1153     1152       -1

Impacted Files	Coverage Δ	Complexity Δ
...ore/services/http/TriggerSmartContractServlet.java	4.65% <ø> (+0.1%)	2 <0> (ø)	⬇️
src/main/java/org/tron/core/net/node/NodeImpl.java	48.06% <0%> (-0.13%)	83% <0%> (-1%)
...org/tron/common/overlay/server/ChannelManager.java	67.56% <0%> (+1.35%)	20% <0%> (+1%)	⬆️
.../common/storage/leveldb/LevelDbDataSourceImpl.java	54.09% <0%> (+1.36%)	34% <0%> (ø)	⬇️
...n/java/org/tron/common/overlay/server/Channel.java	81.3% <0%> (+2.8%)	30% <0%> (+2%)	⬆️
.../main/java/org/tron/core/net/peer/TronHandler.java	100% <0%> (+15.38%)	6% <0%> (+1%)	⬆️

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