Update JavaScript IDL generator to remove invalid Closure JSDoc comments (#4873)

* Update JavaScript IDL generator to remove invalid Closure JSDoc comments

* Revert erroneous changes

* A few more tweaks

* Updated generated code

tests/monster_test_my_game.example2_generated.dart

@@ -6,8 +6,8 @@ library my_game.example2;
 import 'dart:typed_data' show Uint8List;
 import 'package:flat_buffers/flat_buffers.dart' as fb;
 
-import './monster_test_my_game.example_generated.dart' as my_game_example;
 import './monster_test_my_game_generated.dart' as my_game;
+import './monster_test_my_game.example_generated.dart' as my_game_example;
 
 class Monster {
   Monster._(this._bc, this._bcOffset);

tests/monster_test_my_game_generated.dart

@@ -6,8 +6,8 @@ library my_game;
 import 'dart:typed_data' show Uint8List;
 import 'package:flat_buffers/flat_buffers.dart' as fb;
 
-import './monster_test_my_game.example_generated.dart' as my_game_example;
 import './monster_test_my_game.example2_generated.dart' as my_game_example2;
+import './monster_test_my_game.example_generated.dart' as my_game_example;
 
 class InParentNamespace {
   InParentNamespace._(this._bc, this._bcOffset);

tests/namespace_test/NamespaceA/NamespaceB/EnumInNestedNS.go

@@ -2,13 +2,14 @@
 
 package NamespaceB
 
+type EnumInNestedNS = int8
 const (
-	EnumInNestedNSA = 0
-	EnumInNestedNSB = 1
-	EnumInNestedNSC = 2
+	EnumInNestedNSA EnumInNestedNS = 0
+	EnumInNestedNSB EnumInNestedNS = 1
+	EnumInNestedNSC EnumInNestedNS = 2
 )
 
-var EnumNamesEnumInNestedNS = map[int]string{
+var EnumNamesEnumInNestedNS = map[EnumInNestedNS]string{
 	EnumInNestedNSA:"A",
 	EnumInNestedNSB:"B",
 	EnumInNestedNSC:"C",

tests/namespace_test/namespace_test1_generated.ts

@@ -15,19 +15,13 @@ export enum EnumInNestedNS{
  */
 export namespace NamespaceA.NamespaceB{
 export class TableInNestedNS {
-  /**
-   * @type {flatbuffers.ByteBuffer}
-   */
   bb: flatbuffers.ByteBuffer|null = null;
 
-  /**
-   * @type {number}
-   */
   bb_pos:number = 0;
 /**
- * @param {number} i
- * @param {flatbuffers.ByteBuffer} bb
- * @returns {TableInNestedNS}
+ * @param number i
+ * @param flatbuffers.ByteBuffer bb
+ * @returns TableInNestedNS
  */
 __init(i:number, bb:flatbuffers.ByteBuffer):TableInNestedNS {
   this.bb_pos = i;
@@ -36,16 +30,16 @@ __init(i:number, bb:flatbuffers.ByteBuffer):TableInNestedNS {
 };
 
 /**
- * @param {flatbuffers.ByteBuffer} bb
- * @param {TableInNestedNS=} obj
- * @returns {TableInNestedNS}
+ * @param flatbuffers.ByteBuffer bb
+ * @param TableInNestedNS= obj
+ * @returns TableInNestedNS
  */
 static getRootAsTableInNestedNS(bb:flatbuffers.ByteBuffer, obj?:TableInNestedNS):TableInNestedNS {
   return (obj || new TableInNestedNS).__init(bb.readInt32(bb.position()) + bb.position(), bb);
 };
 
 /**
- * @returns {number}
+ * @returns number
  */
 foo():number {
   var offset = this.bb!.__offset(this.bb_pos, 4);
@@ -53,8 +47,8 @@ foo():number {
 };
 
 /**
- * @param {number} value
- * @returns {boolean}
+ * @param number value
+ * @returns boolean
  */
 mutate_foo(value:number):boolean {
   var offset = this.bb!.__offset(this.bb_pos, 4);
@@ -68,23 +62,23 @@ mutate_foo(value:number):boolean {
 };
 
 /**
- * @param {flatbuffers.Builder} builder
+ * @param flatbuffers.Builder builder
  */
 static startTableInNestedNS(builder:flatbuffers.Builder) {
   builder.startObject(1);
 };
 
 /**
- * @param {flatbuffers.Builder} builder
- * @param {number} foo
+ * @param flatbuffers.Builder builder
+ * @param number foo
  */
 static addFoo(builder:flatbuffers.Builder, foo:number) {
   builder.addFieldInt32(0, foo, 0);
 };
 
 /**
- * @param {flatbuffers.Builder} builder
- * @returns {flatbuffers.Offset}
+ * @param flatbuffers.Builder builder
+ * @returns flatbuffers.Offset
  */
 static endTableInNestedNS(builder:flatbuffers.Builder):flatbuffers.Offset {
   var offset = builder.endObject();
@@ -98,19 +92,13 @@ static endTableInNestedNS(builder:flatbuffers.Builder):flatbuffers.Offset {
  */
 export namespace NamespaceA.NamespaceB{
 export class StructInNestedNS {
-  /**
-   * @type {flatbuffers.ByteBuffer}
-   */
   bb: flatbuffers.ByteBuffer|null = null;
 
-  /**
-   * @type {number}
-   */
   bb_pos:number = 0;
 /**
- * @param {number} i
- * @param {flatbuffers.ByteBuffer} bb
- * @returns {StructInNestedNS}
+ * @param number i
+ * @param flatbuffers.ByteBuffer bb
+ * @returns StructInNestedNS
  */
 __init(i:number, bb:flatbuffers.ByteBuffer):StructInNestedNS {
   this.bb_pos = i;
@@ -119,15 +107,15 @@ __init(i:number, bb:flatbuffers.ByteBuffer):StructInNestedNS {
 };
 
 /**
- * @returns {number}
+ * @returns number
  */
 a():number {
   return this.bb!.readInt32(this.bb_pos);
 };
 
 /**
- * @param {number} value
- * @returns {boolean}
+ * @param number value
+ * @returns boolean
  */
 mutate_a(value:number):boolean {
   var offset = this.bb!.__offset(this.bb_pos, 0);
@@ -141,15 +129,15 @@ mutate_a(value:number):boolean {
 };
 
 /**
- * @returns {number}
+ * @returns number
  */
 b():number {
   return this.bb!.readInt32(this.bb_pos + 4);
 };
 
 /**
- * @param {number} value
- * @returns {boolean}
+ * @param number value
+ * @returns boolean
  */
 mutate_b(value:number):boolean {
   var offset = this.bb!.__offset(this.bb_pos, 4);
@@ -163,10 +151,10 @@ mutate_b(value:number):boolean {
 };
 
 /**
- * @param {flatbuffers.Builder} builder
- * @param {number} a
- * @param {number} b
- * @returns {flatbuffers.Offset}
+ * @param flatbuffers.Builder builder
+ * @param number a
+ * @param number b
+ * @returns flatbuffers.Offset
  */
 static createStructInNestedNS(builder:flatbuffers.Builder, a: number, b: number):flatbuffers.Offset {
   builder.prep(4, 8);