remove unused type variables in ref_elem_utils.jl

[codecov[bot]]

Codecov Report

Merging #60 (0f9101b) into main (a0b7bf8) will decrease coverage by 0.04%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main      #60      +/-   ##
==========================================
- Coverage   97.56%   97.52%   -0.05%     
==========================================
  Files          19       19              
  Lines        2178     2178              
==========================================
- Hits         2125     2124       -1     
- Misses         53       54       +1     

Impacted Files	Coverage Δ
src/ref_elem_utils.jl	98.64% <100.00%> (ø)
src/state_redistribution.jl	94.32% <0.00%> (-0.71%)	:arrow_down:

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[ranocha]

Yeah, might have been some merge issues, I guess