Fix unnecessarily large paddings

[chhwang]

No description provided.

[codecov]

Codecov Report

Merging #153 (6ffaf1f) into main (7ff517d) will increase coverage by 0.07%.
The diff coverage is 92.20%.

❗ Current head 6ffaf1f differs from pull request most recent head 1f773da. Consider uploading reports for the commit 1f773da to get more accurate results

@@            Coverage Diff             @@
##             main     #153      +/-   ##
==========================================
+ Coverage   78.13%   78.21%   +0.07%     
==========================================
  Files          84       84              
  Lines        6001     6031      +30     
==========================================
+ Hits         4689     4717      +28     
- Misses       1312     1314       +2     

Files	Coverage Δ
ark/ops/ops_add.cc	90.47% <100.00%> (+0.47%)	⬆️
ark/ops/ops_all_reduce.cc	91.66% <ø> (+5.95%)	⬆️
ark/ops/ops_cast.cc	76.92% <100.00%> (+0.60%)	⬆️
ark/ops/ops_div.cc	83.33% <100.00%> (+0.83%)	⬆️
ark/ops/ops_exp.cc	87.87% <100.00%> (+0.78%)	⬆️
ark/ops/ops_gelu.cc	87.87% <100.00%> (+0.78%)	⬆️
ark/ops/ops_im2col.cc	81.53% <100.00%> (+0.58%)	⬆️
ark/ops/ops_layernorm.cc	87.87% <100.00%> (+0.78%)	⬆️
ark/ops/ops_matmul.cc	90.54% <100.00%> (+0.12%)	⬆️
ark/ops/ops_mul.cc	90.47% <100.00%> (+0.47%)	⬆️
... and 16 more