Remove old projects and actions flags

[mattdholloway]

Summary

Why

Fixes #

What changed

MCP impact

• No tool or API changes
• Tool schema or behavior changed
• New tool added

Prompts tested (tool changes only)

Security / limits

• No security or limits impact
• Auth / permissions considered
• Data exposure, filtering, or token/size limits considered

Tool renaming

• I am renaming tools as part of this PR (e.g. a part of a consolidation effort)
  • I have added the new tool aliases in deprecated_tool_aliases.go
• I am not renaming tools as part of this PR

Note: if you're renaming tools, you must add the tool aliases. For more information on how to do so, please refer to the official docs.

Lint & tests

• Linted locally with ./script/lint
• Tested locally with ./script/test

Docs

• Not needed
• Updated (README / docs / examples)

[Copilot]

Pull request overview

This PR removes deprecated feature flag constants that are no longer in use. The removed constants (FeatureFlagConsolidatedProjects and FeatureFlagConsolidatedActions) were legacy flags that have been superseded by the current holdback flags.

Changes:

• Removed FeatureFlagConsolidatedProjects constant from projects.go
• Removed FeatureFlagConsolidatedActions constant from actions.go

Reviewed changes

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

File	Description
pkg/github/projects.go	Removes deprecated FeatureFlagConsolidatedProjects constant and its documentation comment while preserving the active FeatureFlagHoldbackConsolidatedProjects flag
pkg/github/actions.go	Removes deprecated FeatureFlagConsolidatedActions constant and its documentation comment while preserving the active FeatureFlagHoldbackConsolidatedActions flag