bug#10554: 24.0.92; No units specified (dimensionless quantities in Emacs Calc)

[Jay Belanger]

> If the old expression was "7 in / m" and the new unit is "1", this
> should be converted to 0.178,
>
> - This is already the answer we get from calc-simplify-units.

Right, so if the user wants the units simplified, they can call
calc-simplify-units.  If the user wants to convert units, they can call
calc-convert-units.

> So every plain, dimensionless number in Calc can be converted to
> ones. "7" becomes "7 one",

There is no need for that.  "7" is fine.

Jay