diff --git a/hcl/json/public.go b/hcl/json/public.go
index 8d4b052..27d4c5c 100644
--- a/hcl/json/public.go
+++ b/hcl/json/public.go
@@ -88,28 +88,3 @@ func ParseFile(filename string) (*hcl.File, hcl.Diagnostics) {
 
 	return Parse(src, filename)
 }
-
-// ParseWithHIL is like Parse except the returned file will use the HIL
-// template syntax for expressions in strings, rather than the native zcl
-// template syntax.
-//
-// This is intended for providing backward compatibility for applications that
-// used to use HCL/HIL and thus had a JSON-based format with HIL
-// interpolations.
-func ParseWithHIL(src []byte, filename string) (*hcl.File, hcl.Diagnostics) {
-	file, diags := Parse(src, filename)
-	if file != nil && file.Body != nil {
-		file.Body.(*body).useHIL = true
-	}
-	return file, diags
-}
-
-// ParseFileWithHIL is like ParseWithHIL but it reads data from a file before
-// parsing it.
-func ParseFileWithHIL(filename string) (*hcl.File, hcl.Diagnostics) {
-	file, diags := ParseFile(filename)
-	if file != nil && file.Body != nil {
-		file.Body.(*body).useHIL = true
-	}
-	return file, diags
-}
diff --git a/hcl/json/public_test.go b/hcl/json/public_test.go
index 859873e..16ea0bb 100644
--- a/hcl/json/public_test.go
+++ b/hcl/json/public_test.go
@@ -95,30 +95,3 @@ func TestParseTemplateUnwrap(t *testing.T) {
 		t.Errorf("wrong result %#v; want %#v", val, cty.True)
 	}
 }
-
-func TestParseTemplateWithHIL(t *testing.T) {
-	src := `{"greeting": "hello ${\"world\"}"}`
-	file, diags := ParseWithHIL([]byte(src), "")
-	if len(diags) != 0 {
-		t.Errorf("got %d diagnostics on parse; want 0", len(diags))
-	}
-	if file == nil {
-		t.Errorf("got nil File; want actual file")
-	}
-	if file.Body == nil {
-		t.Fatalf("got nil Body; want actual body")
-	}
-	attrs, diags := file.Body.JustAttributes()
-	if len(diags) != 0 {
-		t.Errorf("got %d diagnostics on decode; want 0", len(diags))
-	}
-
-	val, diags := attrs["greeting"].Expr.Value(&hcl.EvalContext{})
-	if len(diags) != 0 {
-		t.Errorf("got %d diagnostics on eval; want 0", len(diags))
-	}
-
-	if !val.RawEquals(cty.StringVal("hello world")) {
-		t.Errorf("wrong result %#v; want %#v", val, cty.StringVal("hello world"))
-	}
-}
diff --git a/hcl/json/structure.go b/hcl/json/structure.go
index d039811..2899382 100644
--- a/hcl/json/structure.go
+++ b/hcl/json/structure.go
@@ -17,12 +17,6 @@ type body struct {
 	// be treated as non-existing. This is used when Body.PartialContent is
 	// called, to produce the "remaining content" Body.
 	hiddenAttrs map[string]struct{}
-
-	// If set, string values are turned into expressions using HIL's template
-	// language, rather than the native zcl language. This is intended to
-	// allow applications moving from HCL to zcl to continue to parse the
-	// JSON variant of their config that HCL handled previously.
-	useHIL bool
 }
 
 // expression is the implementation of "Expression" used for files processed
@@ -133,7 +127,6 @@ func (b *body) PartialContent(schema *hcl.BodySchema) (*hcl.BodyContent, hcl.Bod
 	unusedBody := &body{
 		obj:         b.obj,
 		hiddenAttrs: usedNames,
-		useHIL:      b.useHIL,
 	}
 
 	return content, unusedBody, diags
@@ -219,8 +212,7 @@ func (b *body) unpackBlock(v node, typeName string, typeRange *hcl.Range, labels
 			Type:   typeName,
 			Labels: labels,
 			Body: &body{
-				obj:    tv,
-				useHIL: b.useHIL,
+				obj: tv,
 			},
 
 			DefRange:    tv.OpenRange,
@@ -245,8 +237,7 @@ func (b *body) unpackBlock(v node, typeName string, typeRange *hcl.Range, labels
 				Type:   typeName,
 				Labels: labels,
 				Body: &body{
-					obj:    ov,
-					useHIL: b.useHIL,
+					obj: ov,
 				},
 
 				DefRange:    tv.OpenRange,