fix(india): eway bill cancel api is disabled

[maharshivpatel]

E-invoice API for E-way bill cancellation from Adaequare is permanently disabled on their production API.

I had tested their API on staging and it was working fine. I had also checked their API documentation and everything suggested that it was available. Still, it gives a 404 error on production API so I contacted them and after discussion, they have told me that it is disabled on production API and will not be available user will have to cancel it from the e-way bill portal.

I have removed the changes made by #30888 that enabled the cancel API.

@nextchamp-saqib API URL for cancelation https://gsp.adaequare.com/enriched/ewb/ewayapi?action=CANEWB will only work if the user has purchased their e-way bill API Package.

There is no need for the cancel_eway_bill function anymore but I have not removed it.

[codecov]

Codecov Report

Merging #31055 (b9da04b) into develop (28fe4f3) will decrease coverage by 0.09%.
The diff coverage is 20.00%.

@@             Coverage Diff             @@
##           develop   #31055      +/-   ##
===========================================
- Coverage    63.09%   62.99%   -0.10%     
===========================================
  Files          985      985              
  Lines        67280    67281       +1     
===========================================
- Hits         42451    42387      -64     
- Misses       24829    24894      +65     

Impacted Files	Coverage Δ
erpnext/regional/india/e_invoice/utils.py	40.37% <20.00%> (-0.06%)	⬇️
.../report/delayed_item_report/delayed_item_report.py	60.78% <0.00%> (-35.30%)	⬇️
...tch_item_expiry_status/batch_item_expiry_status.py	67.92% <0.00%> (-24.53%)	⬇️
...wise_balance_history/batch_wise_balance_history.py	67.79% <0.00%> (-22.04%)	⬇️
...e_sales_analytics/supplier_wise_sales_analytics.py	81.96% <0.00%> (-8.20%)	⬇️
...unts/report/purchase_register/purchase_register.py	71.71% <0.00%> (-6.58%)	⬇️
erpnext/accounts/party.py	78.09% <0.00%> (-4.62%)	⬇️
...e_purchase_register/item_wise_purchase_register.py	74.25% <0.00%> (-3.97%)	⬇️
.../fifo_queue_vs_qty_after_transaction_comparison.py	93.10% <0.00%> (-1.73%)	⬇️
erpnext/stock/reorder_item.py	75.21% <0.00%> (-1.71%)	⬇️
... and 19 more