refactor(code-review): remove project context loading from step-01

Step-01 focus is: load story + discover git changes. Nothing else.

Project context loading belongs in step-04 (Context-Aware Review) where it
provides audit rules, principles, and requirements for validating AC
implementation against project standards.

(See implementation-notes.md for detail)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

src/modules/bmm/workflows/4-implementation/code-review/steps/step-01-load-story.md

@@ -95,10 +95,6 @@ Set `git_discrepancies` with categories:
 - **files_in_story_not_git**: Files in story File List but no git changes (excluding git-ignored)
 - **uncommitted_undocumented**: Uncommitted changes not tracked in story
 
-### 6. Load Project Context
-
-- Load {project_context} if exists (**/project-context.md) for coding standards
-
 ---
 
 ## NEXT STEP DIRECTIVE
@@ -117,7 +113,6 @@ Set `git_discrepancies` with categories:
 - `story_file_list` compiled from Dev Agent Record
 - `git_changed_files` discovered via git commands
 - `git_discrepancies` calculated
-- `project_context` loaded if exists
 - Explicit NEXT directive provided
 
 ## FAILURE MODES