removed min_grid generic, methods, and functions; moved to tune

[topepo]

No description provided.

[codecov-io]

Codecov Report

Merging #207 into master will decrease coverage by 0.6%.
The diff coverage is 33.33%.

@@            Coverage Diff             @@
##           master     #207      +/-   ##
==========================================
- Coverage   76.06%   75.45%   -0.61%     
==========================================
  Files          38       38              
  Lines        3016     2925      -91     
==========================================
- Hits         2294     2207      -87     
+ Misses        722      718       -4

Impacted Files	Coverage Δ
R/linear_reg.R	75.92% <ø> (-3.44%)	⬇️
R/logistic_reg.R	70.24% <ø> (ø)	⬆️
R/misc.R	33.94% <ø> (+0.3%)	⬆️
R/nearest_neighbor.R	83.33% <ø> (-2.39%)	⬇️
R/aaa.R	0% <ø> (-56.67%)	⬇️
R/multinom_reg.R	77.57% <ø> (ø)	⬆️
R/boost_tree.R	84.53% <ø> (-0.85%)	⬇️
R/mars.R	74.74% <33.33%> (-3.04%)	⬇️

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[github-actions]

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