Revert "feat: Add required fields for merge of invoices & order models"

[iamareebjamal]

Reverts #6196

[codecov]

Codecov Report

Merging #6198 into development will decrease coverage by 0.01%.
The diff coverage is n/a.

@@               Coverage Diff               @@
##           development    #6198      +/-   ##
===============================================
- Coverage        65.99%   65.97%   -0.02%     
===============================================
  Files              288      288              
  Lines            14532    14526       -6     
===============================================
- Hits              9590     9584       -6     
  Misses            4942     4942

Impacted Files	Coverage Δ
app/api/schema/orders.py	88.88% <ø> (-0.35%)	⬇️
app/models/order.py	89.89% <ø> (-0.4%)	⬇️

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[kushthedude]

@iamareebjamal Why ?

[iamareebjamal]

See issue