always remove ClassProperty nodes in flow transformer - fixes #1686

CHANGELOG.md

@@ -13,6 +13,11 @@ _Note: Gaps between patch versions are faulty/broken releases._
 
 See [CHANGELOG - 6to5](CHANGELOG-6to5.md) for the pre-4.0.0 version changelog.
 
+## 5.5.1
+
+ * **Bug Fix**
+  * Remove `ClassProperty` nodes always in the `Flow` transformer. This is fine now since.
+
 ## 5.5.0
 
  * **Bug Fix**

src/babel/transformation/transformers/other/flow.js

@@ -7,7 +7,9 @@ export function Flow(node) {
 }
 
 export function ClassProperty(node) {
-  node.typeAnnotation = null;
+  // todo: uncomment when/if class properties are supported by default.
+  // node.typeAnnotation = null;
+  this.dangerouslyRemove();
 }
 
 export function Class(node) {

test/core/fixtures/transformation/flow/strip-type-annotations/expected.js

@@ -64,14 +64,8 @@ class Foo8 {
   "bar"() {}
 }
 function foo(requiredParam, optParam) {}
-class Foo9 {
-  prop1;
-  prop2;
-}
-class Foo10 {
-  static prop1;
-  prop2;
-}
+class Foo9 {}
+class Foo10 {}
 var x = 4;
 class Array {
   concat(items) {}