Cleanup redundant boolean assertions in rpc/rpchelper tests

[soniseth0]

remove explicit == true/false comparisons in filters_test.go, keep the test expectations intact while aligning with idiomatic Go style, eliminate redundant boolean logic that could trip linters or reviewers

[Copilot]

Pull Request Overview

This PR refactors boolean assertions in filters_test.go to follow idiomatic Go style by removing redundant explicit comparisons with true and false. The changes replace verbose comparisons like if condition == false with the more concise if !condition and if condition == true with if condition, improving code readability while maintaining identical test behavior.

Key changes:

• Converted all == false comparisons to use the ! negation operator
• Converted all == true comparisons to direct boolean evaluation
• No changes to test logic or expectations

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