function exitFunction(node) {
			if (scopeInfo.isBound && !scopeInfo.thisFound) {
				report(node);
			}

			scopeInfo = scopeInfo.upper;
		}
Removes the scope information object from the top of the stack.
At the same time, this reports the function node if the function has
`.bind()` and the `this` keywords found.
@param {ASTNode} node A node to remove. This node is a
     FunctionExpression or a FunctionDeclaration node.
@returns {void}