Removed unnecessary packages

Author: edro15

appserver/static/visualizations/boxplot/package-lock.json

@@ -17,8 +17,6 @@
     "c3": "^0.6.6",
     "d3": "^5.5.0",
     "jquery": "^2.2.4",
-    "nvd3": "^1.8.6",
-    "plotly": "^1.0.6",
     "plotly.js-dist": "^1.46.0",
     "regexp-replace-loader": "^1.0.1",
     "save": "^2.3.2",