Remove spec linting from the Travis file since this doesn't appear to work with JSON podspecs?
Remove spec linting from the Travis file since this doesn't appear to work with JSON podspecs?

alessandrostone/XExtensionItem,alessandrostone/XExtensionItem,tumblr/XExtensionItem,hsavit1/XExtensionItem,alessandrostone/XExtensionItem,tumblr/XExtensionItem,tumblr/XExtensionItem,hsavit1/XExtensionItem,hsavit1/XExtensionItem