[context] remove EnableWeb3Rewarding flag

[dustinxie]

Description

starting v1.10 hard-fork, the network can safely accept claim action in web3 format. the gating check can be removed

Fixes #(issue)

Type of change

Please delete options that are not relevant.

• [] Bug fix (non-breaking change which fixes an issue)
• [] New feature (non-breaking change which adds functionality)
• Code refactor or improvement
• [] Breaking change (fix or feature that would cause a new or changed behavior of existing functionality)
• [] This change requires a documentation update

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• [] make test
• fullsync
• [] Other test (please specify)

Test Configuration:

• Firmware version:
• Hardware:
• Toolchain:
• SDK:

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
No Duplication information

[codecov]

Codecov Report

Merging #3852 (789b633) into master (e1f0636) will increase coverage by 0.09%.
The diff coverage is 70.85%.

❗ Current head 789b633 differs from pull request most recent head 493df0b. Consider uploading reports for the commit 493df0b to get more accurate results

@@            Coverage Diff             @@
##           master    #3852      +/-   ##
==========================================
+ Coverage   75.38%   75.47%   +0.09%     
==========================================
  Files         303      303              
  Lines       25923    26032     +109     
==========================================
+ Hits        19541    19647     +106     
- Misses       5360     5365       +5     
+ Partials     1022     1020       -2     

Impacted Files	Coverage Δ
api/web3server_marshal.go	93.21% <ø> (ø)
api/web3server_utils.go	69.20% <16.66%> (-3.67%)	⬇️
state/factory/factory.go	80.20% <33.33%> (+0.86%)	⬆️
state/factory/statedb.go	81.81% <33.33%> (+1.08%)	⬆️
api/serverV2.go	86.95% <50.00%> (ø)
state/factory/workingset.go	72.69% <67.34%> (+1.27%)	⬆️
api/web3server.go	81.41% <87.50%> (+2.74%)	⬆️
api/coreservice.go	68.09% <88.23%> (+0.74%)	⬆️
action/protocol/context.go	66.92% <100.00%> (-0.26%)	⬇️
action/protocol/rewarding/reward.go	90.07% <100.00%> (+0.60%)	⬆️
... and 1 more

... and 2 files with indirect coverage changes

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