Dead code: stripAppendedEnvironmentDetails never called in production

[hannesrudolph]

Problem

PR #11198 introduced stripAppendedEnvironmentDetails(), stripEnvDetailsFromText(), and stripEnvDetailsFromToolResult() in appendEnvironmentDetails.ts. These functions are exported, tested, but never imported or called anywhere in production code (Task.ts only imports removeEnvironmentDetailsBlocks and appendEnvironmentDetails).

This dead code adds 93 lines of unreachable logic and 7 test cases for code that cannot execute, increasing maintenance burden and giving a false sense of coverage.

Impact

• Developers maintaining appendEnvironmentDetails.ts may assume the stripping functions are in use and be reluctant to modify them
• 191 lines of dead code and tests inflate the codebase unnecessarily

[roomote]

I've analyzed this issue and confirmed the dead code. Here's my proposed implementation plan:

Dead code to remove from src/core/task/appendEnvironmentDetails.ts:

1. Remove stripAppendedEnvironmentDetails function (lines 155-186) - exported but never imported anywhere
2. Remove stripEnvDetailsFromText helper function (lines 191-195) - private helper only used by the above
3. Remove stripEnvDetailsFromToolResult helper function (lines 200-238) - private helper only used by the above
4. Remove associated JSDoc comments (lines 147-154, 188-190, 197-199)

Dead tests to remove from src/core/task/__tests__/appendEnvironmentDetails.spec.ts:

1. Remove the entire describe("stripAppendedEnvironmentDetails", ...) block (lines 323-414)
2. Remove the import of stripAppendedEnvironmentDetails from the import statement (line 5)

Impact:

• Removes ~93 lines of unreachable production code
• Removes ~92 lines of tests for dead code
• No functional changes to the application since this code was never called
• Remaining exports (appendEnvironmentDetails, removeEnvironmentDetailsBlocks, UserContentBlock) remain unchanged

Please mention @roomote in a comment saying that you approve this plan, and I'll proceed with the implementation.