Remove node-sass

[Roshanjossey]

PR checklist

Please tick all of the below (if a certain item is not required for this PR please tick the box anyway)

Docs

• [ ] If you added new code; is it self documenting? (all the variable names clear, comments added where appropriate)
• [ ] If you touched existing code; did you refactor existing naming, added comments where necessary?

Tests

• [ ] If your ticket adds new functionality; have you added unit tests to verify behaviour?
• [ ] If your ticket alters user interaction with the UI; have you added integration tests?
• [ ] Do your tests check for every convievable user behabviour? (all behaviours the user can perform)

Typing

• [ ] If you added new code; have you added typing?
• [ ] If you touched existing code; have you improved its typing?

Styling

• [ ] If new styles were created; Did you refactor/add more styles in css-in-js style?
• [ ] Are all fonts, sizes, colours, margins, paddings in line with designs?
• [ ] Did you perform a visual comparison of the implementation with the designs?

[codecov[bot]]

Codecov Report

Merging #358 (c3edaa1) into master (d550671) will decrease coverage by 0.13%. The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #358      +/-   ##
==========================================
- Coverage   68.08%   67.95%   -0.14%     
==========================================
  Files          66       66              
  Lines        1523     1523              
  Branches      234      234              
==========================================
- Hits         1037     1035       -2     
- Misses        486      488       +2     

Impacted Files	Coverage Δ
src/apps/Dashboard.tsx	0.00% <ø> (ø)
src/apps/Hub.tsx	0.00% <ø> (ø)
src/apps/Styleguide.tsx	0.00% <ø> (ø)
src/index.tsx	0.00% <ø> (ø)
src/redux/hub/hub.actions.ts	88.88% <0.00%> (-11.12%)	:arrow_down:

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