Simplify stage and Audita contracts

internal/stage/transcribe.go

@@ -19,17 +19,6 @@ type transcribeStage struct{}
 
 func (transcribeStage) Name() string { return "transcribe" }
 
-func (transcribeStage) Declares() IODecl {
-	return IODecl{
-		Inputs: []artifacts.Ref{
-			{Kind: "audio", Category: "audio", RelativePath: "audio/*.flac"},
-		},
-		Outputs: []artifacts.Ref{
-			{Kind: "transcript_raw", Category: "transcripts", RelativePath: "transcripts/raw/*.json"},
-		},
-	}
-}
-
 func (transcribeStage) Run(ctx context.Context, env *Env, m *manifest.Manifest) (*StageResult, error) {
 	if env == nil || env.Config == nil {
 		return nil, fmt.Errorf("transcribe: stage environment config is required")