accounts/abi: delete duplicate error check

[ucwong]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 47.17%. Comparing base (50eef15) to head (4d14da6).
Report is 9 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1927      +/-   ##
==========================================
- Coverage   47.21%   47.17%   -0.05%     
==========================================
  Files         568      568              
  Lines       68814    68812       -2     
==========================================
- Hits        32492    32462      -30     
- Misses      33799    33832      +33     
+ Partials     2523     2518       -5     

Files	Coverage Δ
accounts/abi/type.go	86.30% <ø> (+0.78%)	⬆️

... and 13 files with indirect coverage changes