fix(cli): remove http_request tool, keep only fetch_url

[Copilot]

Removes http_request from the CLI agent's tool set, leaving fetch_url as the sole URL-fetching tool.

Changes

• tools.py – Deleted http_request function
• main.py / non_interactive.py – Removed http_request from imports and tools list
• widgets/messages.py – Removed http_request from KNOWN_TOOL_NAMES and the formatter dispatch table
• tool_display.py – Removed http_request display branch
• system_prompt.md – Removed ### http_request section
• test_exception_handling.py – Removed http_request tests and now-unused imports

⚠️ Note: This is a breaking change for any workflow relying on the http_request tool being available in the CLI agent.

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[Copilot]

Pull request overview

This PR removes the http_request tool from the DeepAgents CLI, consolidating URL-fetching functionality under the single fetch_url tool. The fetch_url tool provides similar functionality but with a more specific purpose: fetching web page content and converting it to markdown format, whereas http_request was a more general HTTP client tool supporting various HTTP methods and raw JSON/text responses.

Changes:

• Removed http_request function implementation and all its references from the codebase
• Updated tool imports and tool lists in interactive and non-interactive CLI modes
• Cleaned up UI components (widgets, display logic) to remove http_request handling
• Removed documentation and tests related to http_request

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
tools.py	Removed the complete http_request function implementation (75 lines)
main.py	Removed http_request from imports and tools list used in interactive mode
non_interactive.py	Removed http_request from imports and tools list used in non-interactive mode
widgets/messages.py	Removed http_request from KNOWN_TOOL_NAMES and formatter dispatch table, updated comments
tool_display.py	Removed http_request display formatting logic
system_prompt.md	Removed ### http_request documentation section
test_exception_handling.py	Removed two test methods for http_request and cleaned up unused imports (pytest, requests)

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