Removed unused imports and commented code

webstillas/src/App.js

webstillas/src/components/Login.js

webstillas/src/components/Signup.js

webstillas/src/components/Spinner.css

webstillas/src/components/Spinner.js

webstillas/src/components/constants.js

webstillas/src/components/error/error.js

...llas/src/components/logistics/scaffold/addScaffolding.css

webstillas/src/components/projects/elements/preView.js

webstillas/src/components/projects/projects.css

webstillas/src/components/projects/projects.js

webstillas/src/components/scaffolding/scaffolding.css

webstillas/src/components/topBar/topBar.css

webstillas/src/components/topBar/topBar.js

webstillas/src/firebase.js