tokens: Remove the modules you do n't want from node.gyp , remove the .js files from the lib folder , remove them from the builtinLibs array in lib/internal/module.js then build it .
ner_tags: O O O O O O O O B-Library O O O B-File_Type O O O B-File_Name O O O O O O B-Class B-Data_Structure O B-File_Name O O O O