BC: Remove old unused MCP schema

[Matovidlo]

Before asking for review make sure that:

• you created a task for KBC team to update event-schema in Connection (validation in API endpoint)
  • https://linear.app/keboola/issue/DMD-761/update-event-schema
• you notified everyone in #general that even schema is changing

[Copilot]

Pull Request Overview

This pull request removes deprecated MCP (Model Context Protocol) server schema files as part of a breaking change cleanup. The removal includes both the JSON schema definition and its corresponding test fixture.

• Removes unused MCP server tool event schema definition
• Removes associated test fixture for the MCP server tool event

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
schema/ext.keboola.mcp-server.tool.json	Removes the JSON schema definition for MCP server tool events
tests/events/ext.keboola.mcp-server.tool.json	Removes the test fixture data for MCP server tool events

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[Matovidlo]

https://linear.app/keboola/issue/DMD-761/update-event-schema

[Matovidlo]

https://linear.app/keboola/issue/AI-1703/kai-storage-event-component original task