feat: remove oracle v1, v2 contracts

[rustcandy]

Overview

Removed the code related to oracle V1, V2 contracts. It won't update them after this migration.

closes: #XXXX

What changes have been made in this PR?

• [ ]

Checklist

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• Appropriate labels applied
• Targeted PR against correct branch
• Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
• Wrote unit and integration
• Updated relevant documentation

[coderabbitai]

Walkthrough

The recent updates focus on streamlining the handling of oracle rates in a Rust-based staking contract. The changes involve consolidating rate update logic, removing outdated rate handling structures, and simplifying response structures across modules. These modifications aim to enhance code clarity, maintainability, and test alignment with the revised functionality.

Changes

File(s)	Summary
Cargo.toml	Updated version from "0.4.17" to "0.4.18".
contracts/staking/src/execute.rs, contracts/staking/src/oracle.rs	Unified rate update logic, removed outdated rate handling structures.
contracts/staking/src/msg.rs	Simplified ConfigResponse by removing multiple oracle addresses.
contracts/staking/src/tests/...	Adjusted tests to reflect updated message handling and reduced complexity for improved clarity.

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Recent Review Details

Configuration used: CodeRabbit UI
Review profile: CHILL

Commits

Files that changed from the base of the PR and between 513377d and 1abfb5c.

Files selected for processing (2)

• contracts/staking/src/execute.rs (2 hunks)
• contracts/staking/src/oracle.rs (1 hunks)

Files skipped from review as they are similar to previous changes (2)

• contracts/staking/src/execute.rs
• contracts/staking/src/oracle.rs

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[manu0466]

The code looks good to me.
Can you please remove the unused imports in the execute.rs and oracle.rs files?

[hallazzang]

LGTM