Remove dead code identified by deadcode tool (#37271)

Ran [`deadcode`](https://pkg.go.dev/golang.org/x/tools/cmd/deadcode)
(`-test ./...`) to find functions, methods and error types unreachable
from any call path (including tests), and removed the truly-dead ones.

Co-authored-by: Claude (Opus 4.7) <noreply@anthropic.com>

modules/actions/jobparser/jobparser.go

@@ -83,12 +83,6 @@ func Parse(content []byte, options ...ParseOption) ([]*SingleWorkflow, error) {
 	return ret, nil
 }
 
-func WithJobResults(results map[string]string) ParseOption {
-	return func(c *parseContext) {
-		c.jobResults = results
-	}
-}
-
 func WithGitContext(context *model.GithubContext) ParseOption {
 	return func(c *parseContext) {
 		c.gitContext = context