CHIA-1451 Remove no longer needed TestWalletInterestedStore class

[AmineKhaldi]

Purpose:

As we're using pytest instead of unittest, this class isn't needed anymore.

Current Behavior:

Tests are grouped into a TestWalletInterestedStore class.

New Behavior:

Tests are no longer grouped into a TestWalletInterestedStore class.

[coveralls-official]

Pull Request Test Coverage Report for Build 10992482258

Details

• 28 of 28 (100.0%) changed or added relevant lines in 1 file are covered.
• 19 unchanged lines in 7 files lost coverage.
• Overall coverage increased (+0.03%) to 90.966%

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Files with Coverage Reduction	New Missed Lines	%
chia/full_node/full_node_api.py	1	82.43%
chia/_tests/core/full_node/test_transactions.py	1	99.14%
chia/full_node/full_node.py	1	86.94%
chia/timelord/timelord_launcher.py	2	70.55%
chia/_tests/core/test_farmer_harvester_rpc.py	2	98.02%
chia/rpc/rpc_server.py	3	87.83%
chia/wallet/wallet_node.py	9	88.37%

Totals
Change from base Build 10966863149:	0.03%
Covered Lines:	101966
Relevant Lines:	112070

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💛 - Coveralls