Remove unused dimension function

[blegat]

Same as jump-dev/SDPA.jl#43

[codecov]

Codecov Report

Base: 54.01% // Head: 38.74% // Decreases project coverage by -15.27% ⚠️

Coverage data is based on head (02d5bf3) compared to base (53b41fb).
Patch has no changes to coverable lines.

Additional details and impacted files

@@             Coverage Diff             @@
##           master      #77       +/-   ##
===========================================
- Coverage   54.01%   38.74%   -15.28%     
===========================================
  Files           9        9               
  Lines         809      826       +17     
===========================================
- Hits          437      320      -117     
- Misses        372      506      +134     

Impacted Files	Coverage Δ
src/MOI_wrapper.jl	85.66% <ø> (+2.02%)	⬆️
src/blockdiag.jl	0.00% <0.00%> (-83.34%)	⬇️
src/blockmat.jl	7.14% <0.00%> (-54.80%)	⬇️
src/declarations.jl	20.95% <0.00%> (-18.86%)	⬇️
src/blockmat.h.jl	55.55% <0.00%> (-13.68%)	⬇️
src/declarations.h.jl	11.16% <0.00%> (-7.29%)	⬇️
src/options.jl	41.66% <0.00%> (-3.79%)	⬇️
src/CSDP.jl	100.00% <0.00%> (ø)
src/debug-mat.jl	0.00% <0.00%> (ø)

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