del: remove mint and fix tests

[codecov-commenter]

Codecov Report

Merging #65 (d49bafb) into main (0069dfc) will decrease coverage by 0.90%. The diff coverage is 21.47%.

@@            Coverage Diff             @@
##             main      #65      +/-   ##
==========================================
- Coverage   43.15%   42.24%   -0.91%     
==========================================
  Files          36       36              
  Lines        2577     2540      -37     
==========================================
- Hits         1112     1073      -39     
- Misses       1465     1467       +2     

Impacted Files	Coverage Δ
pallets/nft/src/lib.rs	42.19% <15.00%> (-3.09%)	:arrow_down:
pallets/ad/src/lib.rs	45.38% <28.98%> (-2.87%)	:arrow_down:
pallets/assetmanager/src/lib.rs	18.18% <0.00%> (-9.10%)	:arrow_down:
pallets/nft/src/ocw/mod.rs	33.33% <0.00%> (-1.29%)	:arrow_down:
pallets/swap/src/impl_swaps.rs	35.19% <0.00%> (+1.67%)	:arrow_up:

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