Revert "Add hackathon prizes view and projects"

[octavioamu]

Reverts #6347

This code was already used in #6359

[codecov]

Codecov Report

Merging #6358 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #6358   +/-   ##
=======================================
  Coverage   27.56%   27.56%           
=======================================
  Files         282      282           
  Lines       26148    26148           
  Branches     3850     3850           
=======================================
  Hits         7208     7208           
+ Misses      18675    18671    -4     
- Partials      265      269    +4

Impacted Files	Coverage Δ
...eting/management/commands/assemble_leaderboards.py	40.48% <0%> (ø)	⬆️
app/dashboard/views.py	11.21% <0%> (ø)	⬆️
...rketing/management/commands/no_applicants_email.py	0% <0%> (ø)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update be55700...4d0ca1a. Read the comment docs.