no-useless-template-literals.js

module.exports = {
  create: function(context) {
    return {
      TemplateLiteral(node) {
        if (node.expressions.length === 0 && node.parent.type !== 'BinaryExpression') {
          context.report({
            node,
            message: 'Unnecessary use of template literals. Use regular strings instead.'
          });
        }
      }
    };
  }
};