chore: cleanup unused functions in the pipelineRun ceconciler resources

These functions are no longer needed after the previous refactoring,
so they can be cleaned up.

pkg/reconciler/pipelinerun/resources/apply.go

@@ -330,7 +330,7 @@ func replaceParamValues(params v1beta1.Params, stringReplacements map[string]str
 // and omitted from the returned slice. A nil slice is returned if no results are passed in or all
 // results are invalid.
 func ApplyTaskResultsToPipelineResults(
-	ctx context.Context,
+	_ context.Context,
 	results []v1beta1.PipelineResult,
 	taskRunResults map[string][]v1beta1.TaskRunResult,
 	customTaskResults map[string][]v1beta1.CustomRunResult,

pkg/reconciler/pipelinerun/resources/pipelineref_test.go

@@ -183,7 +183,7 @@ func TestGetPipelineFunc(t *testing.T) {
 			Name:   "simple",
 			Bundle: u.Host + "/remote-pipeline-without-defaults",
 		},
-		expected: simplePipelineWithSpecParamAndKind(v1beta1.ParamTypeString, v1beta1.NamespacedTaskKind),
+		expected: simplePipelineWithSpecParamAndKind(),
 	}}
 
 	for _, tc := range testcases {
@@ -886,7 +886,7 @@ func simplePipelineWithSpecAndParam(pt v1beta1.ParamType) *v1beta1.Pipeline {
 	return p
 }
 
-func simplePipelineWithSpecParamAndKind(pt v1beta1.ParamType, tk v1beta1.TaskKind) *v1beta1.Pipeline {
+func simplePipelineWithSpecParamAndKind() *v1beta1.Pipeline {
 	p := simplePipelineWithBaseSpec()
 	p.Spec.Params = []v1beta1.ParamSpec{{
 		Name: "foo",

pkg/reconciler/pipelinerun/resources/pipelinerunresolution.go

@@ -665,11 +665,7 @@ func (t *ResolvedPipelineTask) resolvePipelineRunTaskWithTaskRun(
 		}
 	}
 
-	if err := t.resolveTaskResources(ctx, getTask, pipelineTask, taskRun); err != nil {
-		return err
-	}
-
-	return nil
+	return t.resolveTaskResources(ctx, getTask, pipelineTask, taskRun)
 }
 
 func (t *ResolvedPipelineTask) resolveTaskResources(
@@ -812,7 +808,7 @@ func getRunNamesFromChildRefs(childRefs []v1beta1.ChildStatusReference, ptName s
 
 // resolvePipelineTaskResources matches PipelineResources referenced by pt inputs and outputs with the
 // providedResources and returns an instance of ResolvedTask.
-func resolvePipelineTaskResources(pt v1beta1.PipelineTask, ts *v1beta1.TaskSpec, taskName string, kind v1beta1.TaskKind) (*resources.ResolvedTask, error) {
+func resolvePipelineTaskResources(_ v1beta1.PipelineTask, ts *v1beta1.TaskSpec, taskName string, kind v1beta1.TaskKind) (*resources.ResolvedTask, error) {
 	rtr := resources.ResolvedTask{
 		TaskName: taskName,
 		TaskSpec: ts,

pkg/reconciler/pipelinerun/resources/resultrefresolution.go

@@ -71,29 +71,6 @@ func validateArrayResultsIndex(allResolvedResultRefs ResolvedResultRefs) (Resolv
 	return allResolvedResultRefs, "", nil
 }
 
-// extractResultRefs resolves any ResultReference that are found in param or pipeline result
-// Returns nil if none are found
-func extractResultRefsForParam(pipelineRunState PipelineRunState, param v1beta1.Param) (ResolvedResultRefs, error) {
-	expressions, ok := v1beta1.GetVarSubstitutionExpressionsForParam(param)
-	if ok {
-		return extractResultRefs(expressions, pipelineRunState)
-	}
-	return nil, nil
-}
-
-func extractResultRefs(expressions []string, pipelineRunState PipelineRunState) (ResolvedResultRefs, error) {
-	resultRefs := v1beta1.NewResultRefs(expressions)
-	var resolvedResultRefs ResolvedResultRefs
-	for _, resultRef := range resultRefs {
-		resolvedResultRef, _, err := resolveResultRef(pipelineRunState, resultRef)
-		if err != nil {
-			return nil, err
-		}
-		resolvedResultRefs = append(resolvedResultRefs, resolvedResultRef)
-	}
-	return removeDup(resolvedResultRefs), nil
-}
-
 func removeDup(refs ResolvedResultRefs) ResolvedResultRefs {
 	if refs == nil {
 		return nil