plugin: remove dead code

[RaghavSood]

Removes dead code from past implementations

Summary by CodeRabbit

• Refactor
  • Removed the API endpoint that returned the policy schema.
• Chores
  • Simplified server configuration by removing the mode setting from the plugin configuration.

[coderabbitai]

Walkthrough

Removed the Server.GetPolicySchema HTTP handler and related filesystem-based schema loading; removed the Server.struct field mode; deleted mode: plugin from config-plugin.yaml. No other handlers, config keys, or public signatures were changed.

Changes

Cohort / File(s)	Summary of Changes
API: plugin handler api/plugin.go	Removed func (s *Server) GetPolicySchema(c echo.Context) error which read plugin/{plugin_id}/dcaPluginUiSchema.json and returned it as JSON; removed unused imports (encoding/json, os, filepath).
API: server struct api/server.go	Removed mode string field from Server struct.
Config: plugin mode config-plugin.yaml	Deleted mode: plugin entry from server configuration; other plugin config (e.g., type: fees) unchanged.

Sequence Diagram(s)

sequenceDiagram
    autonumber
    participant Client
    participant Server
    participant FS as Filesystem

    Note over Client,FS: Previous flow (before change)
    Client->>Server: GET /plugin/policy-schema (with header plugin_id)
    Server->>FS: Read plugin/{plugin_id}/dcaPluginUiSchema.json
    FS-->>Server: Schema JSON / read error
    Server-->>Client: 200 JSON / error status
    Note right of Server: Handler removed in this PR

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sequenceDiagram
    autonumber
    participant Client
    participant Server

    Note over Client,Server: Current flow (after change)
    Client->>Server: GET /plugin/policy-schema
    Server-->>Client: 404 / route not available (handler removed)

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Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Poem

I nibble lines where handlers sleep,
Quietly pulled a mode so deep.
Schema path trimmed, imports few—
Hop, hop, the code feels new. 🥕🐇

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📥 Commits

Reviewing files that changed from the base of the PR and between a0381fc and 6645a64.

📒 Files selected for processing (1)

• api/plugin.go (0 hunks)

💤 Files with no reviewable changes (1)

• api/plugin.go

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• 📝 Generate Docstrings

🧪 Generate unit tests

• Create PR with unit tests
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• Commit unit tests in branch chore/dead_code

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[Copilot]

Pull Request Overview

Removes dead code from past plugin implementations by eliminating unused configuration properties, struct fields, and methods.

• Removed unused mode configuration property and corresponding struct field
• Eliminated deprecated GetPolicySchema method that was no longer in use
• Cleaned up legacy plugin configuration remnants

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
config-plugin.yaml	Removes unused mode: plugin configuration property
api/server.go	Removes unused mode field from Server struct
api/plugin.go	Removes deprecated GetPolicySchema method implementation

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[johnnyluo]

LGTM