remove references to local node-gyp now that the dependency has been removed
remove references to local node-gyp now that the dependency has been removed

jprichardson/node-kexec,foysavas/node-kexec,foysavas/node-kexec,jakubskopal/node-execpe,foysavas/node-kexec,jprichardson/node-kexec,jprichardson/node-kexec,jakubskopal/node-execpe,jakubskopal/node-execpe