Some operators don't exist

Author: icecream17

grammars/tree-sitter-javascript.cson

@@ -216,9 +216,6 @@ scopes:
   '"|="': 'keyword.operator.js'
   '"^="': 'keyword.operator.js'
   '"&="': 'keyword.operator.js'
-  '"??="': 'keyword.operator.js'
-  '"||="': 'keyword.operator.js'
-  '"&&="': 'keyword.operator.js'
   '"-="': 'keyword.operator.js'
   '"+="': 'keyword.operator.js'
   '"%="': 'keyword.operator.js'