fix(release): replace invalid remove_lane_context_values in validate lane

[jkmassel]

What?

Fixes the validate Fastlane lane that gates tagged releases. Replaces a call to a non-existent action with the canonical Fastlane idiom for deleting lane-context values.

Why?

Build #2363 (the 0.17.0 release) failed at the :white_check_mark: Validate Swift release v0.17.0 step with:

Could not find action, lane or variable 'remove_lane_context_values'

remove_lane_context_values isn't a real Fastlane action. The call was introduced in #502 but never exercised by an actual release until the 0.17.0 attempt, which is why CI didn't catch it earlier. Because :rocket: Publish Swift release depends_on: validate-release, the tag was never pushed and no public artifact (tag, GH Release, or gutenbergkit/v0.17.0/ on S3) was ever produced.

How?

lane_context is a built-in Fastlane action that returns Actions.lane_context — a Hash subclass. Use Hash#delete directly:

[
  SharedValues::GITHUB_API_RESPONSE,
  SharedValues::GITHUB_API_STATUS_CODE,
  SharedValues::GITHUB_API_JSON
].each { |key| lane_context.delete(key) }

The defensive cleanup intent (clear the probe values so a later action doesn't see stale state) is preserved — only the syntax changes.

Testing Instructions

validate is read-only (checks version format, probes git for an existing tag, probes GitHub for an existing release) — safe to run locally:

bundle install
GITHUB_TOKEN=$(gh auth token) bundle exec fastlane validate version:v0.17.1

Expected: fastlane.tools finished successfully, with setup_ci, git_tag_exists, and get_github_release in the action summary, and no Could not find action error from the cleanup block.

• ruby -c fastlane/Fastfile passes (syntax check)
• bundle exec fastlane validate version:v0.17.1 passes locally

[wpmobilebot]

XCFramework Build

This PR's XCFramework is available for testing. Add the following to your Package.swift:

.package(url: "https://github.com/wordpress-mobile/GutenbergKit", branch: "pr-build/520")

_{Built from 3e711bc}