refactor: removed validation to check zero qty

[rohitwaghchaure]

Steps to replicate the issue

1. Set backflush bashed on as "Material Transferred for Subcontract" in the buying settings
2. Create the subcontracted Purchase Order
3. Transfer extra materials in batches
4. While making purchase receipt, update the Consumed Qty of one raw material to zero
5. Try to save the purchase receipt
6. You will get the error that "the consumed qty cannot be zero for the item XYZ"

Why user wants to keep the qty as Zero?
User has transferred extra materials which supplier has not consumed and user wants to return non consumed materials back to the their store warehouse

Issue

[codecov]

Codecov Report

Merging #30015 (39d3f20) into develop (96e87fe) will decrease coverage by 4.15%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop   #30015      +/-   ##
===========================================
- Coverage    59.48%   55.33%   -4.16%     
===========================================
  Files         1109     1084      -25     
  Lines        69188    68458     -730     
===========================================
- Hits         41157    37879    -3278     
- Misses       28031    30579    +2548     

Impacted Files	Coverage Δ
erpnext/controllers/subcontracting.py	91.98% <ø> (+0.22%)	⬆️
...rpnext/hr/doctype/grievance_type/grievance_type.py	0.00% <0.00%> (-100.00%)	⬇️
...pnext/loan_management/doctype/unpledge/unpledge.py	0.00% <0.00%> (-100.00%)	⬇️
...next/accounts/doctype/dunning_type/dunning_type.py	0.00% <0.00%> (-100.00%)	⬇️
...next/hr/doctype/vehicle_service/vehicle_service.py	0.00% <0.00%> (-100.00%)	⬇️
.../accounts/doctype/budget_account/budget_account.py	0.00% <0.00%> (-100.00%)	⬇️
...ounts/doctype/cash_flow_mapper/cash_flow_mapper.py	0.00% <0.00%> (-100.00%)	⬇️
...nts/doctype/allowed_dimension/allowed_dimension.py	0.00% <0.00%> (-100.00%)	⬇️
...nts/doctype/bank_account_type/bank_account_type.py	0.00% <0.00%> (-100.00%)	⬇️
...doctype/dunning_letter_text/dunning_letter_text.py	0.00% <0.00%> (-100.00%)	⬇️
... and 179 more

[rohitwaghchaure]

@Mergifyio backport version-13-hotfix

[mergify]

backport version-13-hotfix

✅ Backports have been created

• #30023 refactor: removed validation to check zero qty (backport #30015) has been created for branch version-13-hotfix