:decimal_limits_drop — drops explicit Decimal parsing/rendering limit arguments.

The family removes trailing options or format arguments so calls use Decimal's default parsing and rendering limits:

Decimal.parse(input, opts)        # -> Decimal.parse(input)
Decimal.cast(input, opts)         # -> Decimal.cast(input)
Decimal.new(input, opts)          # -> Decimal.new(input)
Decimal.to_string(num, type, opts) # -> Decimal.to_string(num, type)
Decimal.to_string(num, type)       # -> Decimal.to_string(num)

Literal arguments equivalent to Decimal's defaults are skipped.

Dropping to_string/2's format argument is equivalent to setting it to :scientific. To avoid duplicating this mutation, Mutare.Decimal.ModeSwap excludes :scientific as a swap target for to_string/2 (see its module docs).