Strip propTypes from components created with React.creactClass()

.babelrc

{
  "presets": [
    "es2015",
    "stage-1",
    "react"
  ],
  "plugins": [
    "./path-to/babel-plugin-remove-proptypes.js"
  ]
}

babel-plugin-remove-proptypes.js

function isCreateClassCall(path) {
    try {
        var parentPath  = path.contexts[0].parentPath,
            parent      = parentPath.parent,
            grandparent = parentPath.contexts[0].parentPath.parent,
            callee      = grandparent.callee,
            args        = grandparent.arguments,
            isRender    = prop => prop.key.name === 'render';

        return parent.type === 'ObjectExpression' &&    // "propTypes" has to be a property of an object
            parent.properties.length > 1 &&             // ... which has more than 1 sibling key
            callee.type === 'MemberExpression' &&       // the object is an argument to an object.method call
            callee.property.name === 'createClass' &&   // ... and whose method is "createClass"
            args.length === 1 &&                        // ... and the method call has exactly 1 argument
            parent.properties.some(isRender);           // and there is a "render" key on the object
    }
    catch(e) {
        return false;
    }
}

function removePropTypes() {
    return {
        visitor: {
            Identifier(path) {
                if (path.node.name === 'propTypes' && isCreateClassCall(path)) {
                    path.parentPath.remove();
                }
            }
        }
    };
}

module.exports = removePropTypes;