Fix gosimple warnings in the code base

infer/resource.go

@@ -705,9 +705,7 @@ func (i *inputField) Computed() InputField {
 	input.kind = inputComputed
 	// Copy input fields
 	input.fields = make([]introspect.FieldTag, len(i.fields))
-	for i, f := range i.fields {
-		input.fields[i] = f
-	}
+	copy(input.fields, i.fields)
 	return input
 }
 
@@ -716,9 +714,7 @@ func (i *inputField) Secret() InputField {
 	input.kind = inputSecret
 	// Copy input fields
 	input.fields = make([]introspect.FieldTag, len(i.fields))
-	for i, f := range i.fields {
-		input.fields[i] = f
-	}
+	copy(input.fields, i.fields)
 	return input
 }
 

infer/types_test.go

@@ -259,10 +259,6 @@ func TestInvalidOptionalProperty(t *testing.T) {
 	type invalidContainsOptionalEnum struct {
 		Foo MyEnum `pulumi:"name,optional"`
 	}
-	type validContainsEnum struct {
-		Foo MyEnum `pulumi:"name"`
-	}
-
 	type testInner struct {
 		Foo string `pulumi:"foo"`
 	}

middleware/schema/schema.go

@@ -92,11 +92,6 @@ type state struct {
 	innerGetSchema func(ctx context.Context, req p.GetSchemaRequest) (p.GetSchemaResponse, error)
 }
 
-func (s *state) invalidateCache() {
-	s.schema = nil
-	s.combinedSchema = nil
-}
-
 type Options struct {
 	Metadata
 	// Resources from which to derive the schema

provider.go

@@ -482,9 +482,8 @@ func GetSchema(ctx context.Context, name, version string, provider Provider) (sc
 	if err != nil {
 		errs.Errors = append(errs.Errors, err)
 	}
-	for _, err := range collectingDiag.errs.Errors {
-		errs.Errors = append(errs.Errors, err)
-	}
+	errs.Errors = append(errs.Errors, collectingDiag.errs.Errors...)
+
 	spec := schema.PackageSpec{}
 	if err := errs.ErrorOrNil(); err != nil {
 		return spec, err