comment is not removed on removing embedded frameworks

Currently after adding an embedded framework, 4 entries are added to the PBXBuildFileSection.

{{ "128CD4F705D24987A12F213E":

{ "isa": "PBXBuildFile", "fileRef": "021AA25C78F942DA94C24904", "fileRef_comment": "EmbedThirdParty.framework" }

,
"128CD4F705D24987A12F213E_comment": "EmbedThirdParty.framework in Frameworks",
"B9B17AE7AA7C4663BA933B64": {
"isa": "PBXBuildFile",
"fileRef": "021AA25C78F942DA94C24904",
"fileRef_comment": "EmbedThirdParty.framework",
"settings":

{ "ATTRIBUTES": ["CodeSignOnCopy"] }

},
"B9B17AE7AA7C4663BA933B64_comment": "EmbedThirdParty.framework in Embed Frameworks",}}

After calling removeFramework function, the current existing code will incorrectly leave a orphan entry in the PBXFileSection:

{{ "B9B17AE7AA7C4663BA933B64_comment": "EmbedThirdParty.framework in Embed Frameworks",}}

Pull request #5 fixes this issue, and adds a relevant unit test in removeFramework.js
https://github.com/apache/cordova-node-xcode/pull/5