remove unnecessary reserved words

Author: YaroShkvorets

packages/cli/src/codegen/util.ts

@@ -29,7 +29,6 @@ const RESERVED_WORDS = new Set([
   'const',
   'continue',
   'debugger',
-  'default',
   'delete',
   'do',
   'else',
@@ -38,17 +37,14 @@ const RESERVED_WORDS = new Set([
   'extends',
   'false',
   'finally',
-  'for',
   'function',
   'if',
   'implements',
   'import',
   'in',
-  'instanceof',
   'interface',
   'let',
   'new',
-  'null',
   'package',
   'private',
   'protected',
@@ -63,7 +59,6 @@ const RESERVED_WORDS = new Set([
   'try',
   'typeof',
   'var',
-  'void',
   'while',
   'with',
   'yield',