Remove unused context import from remote fetch integration test

[Copilot]

The parser remote fetch integration test referenced t.Context() but still imported the standard-library context package directly. That left pkg/parser/remote_fetch_integration_test.go failing to compile in CI with an unused-import error, breaking the affected integration jobs.

• Scope

  • Remove the unused context import from pkg/parser/remote_fetch_integration_test.go.

• Effect

  • Restore compilation of the parser integration test package.
  • Unblock CI jobs that exercise remote fetch and unauthenticated add flows.

• Code

  import (
  	"strings"
  	"testing"
  
  	"github.com/cli/go-gh/v2/pkg/api"
  	"github.com/github/gh-aw/pkg/errorutil"
  	"github.com/stretchr/testify/assert"
  	"github.com/stretchr/testify/require"
  )