fix: remove nep5 contract pending data

[zengchen221]

Proposed changes in this pull request

• remove nep5 contract pending data
• fix pov pub/sub

Type

• Bug fix: (Link to the issue #{issue No.})
• Feature (Non-breaking change)
• Feature (Breaking change)
• Documentation Improvement

Checklist

Write a small comment explaining if its N/A (not applicable)

• Read the CONTRIBUTION.
• All the tests are passing after the introduction of new changes.
• Added tests respective to the part of code I have written.
• Added proper documentation where ever applicable.
• Code has been written according to Golang-Style-Guide

Extra information

Any extra information related to this pull request.

[codecov]

Codecov Report

Merging #1201 into master will decrease coverage by 0.09%.
The diff coverage is 10.52%.

@@            Coverage Diff             @@
##           master    #1201      +/-   ##
==========================================
- Coverage   71.28%   71.18%   -0.10%     
==========================================
  Files         328      328              
  Lines       41216    41223       +7     
==========================================
- Hits        29381    29345      -36     
- Misses       7909     7934      +25     
- Partials     3926     3944      +18     

Flag	Coverage Δ
#unittests	71.18% <10.52%> (-0.10%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
rpc/api/kyc.go	86.57% <ø> (ø)
rpc/api/pov_pubsub.go	69.31% <ø> (ø)
vm/contract/abi/abi_kyc.go	73.97% <ø> (ø)
vm/contract/abi/abi_kyc_types.go	100.00% <ø> (ø)
vm/contract/kyc.go	79.80% <ø> (ø)
vm/contract/nep5_pledge.go	57.32% <0.00%> (-1.77%)	⬇️
ledger/migration/migration.go	64.12% <11.11%> (-4.05%)	⬇️
common/time.go	69.04% <0.00%> (-9.53%)	⬇️
consensus/pov/pov_sync_pool.go	61.99% <0.00%> (-3.62%)	⬇️
p2p/stream.go	71.59% <0.00%> (-2.96%)	⬇️
... and 12 more

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[gythialy]

LGTM