Remove tests that don't match signatures defined in the spec

[EvanMachusak]

Throughout the spec, specifically the Arithmetic tests, we have cases that are testing coercion of data types instead of the actual operation itself. For example:

<test name="Floor1">
  <expression>Floor(1)</expression>
  <output>1</output>
</test>

This test has no specific value to the Floor operator, which is defined this way:

Floor(argument Decimal) Integer

If we want to test type coercion, we should be doing so in a library that is purpose built, e.g.

define function "Takes decimal"(i System.Decimal): 42

define "Test": "Takes decimal"(1)

With an expectation that "Test" equals 42.

There are dozens of tests that are not materially different than other tests except that they coerce an integer to a decimal, e.g.:

        <test name="Divide11">
            <expression>1 / 1</expression>
            <output>1.0</output>
        </test>
        <test name="Divide1d1d">
            <expression>1.0 / 1.0</expression>
            <output>1.0</output>
        </test>

We should eliminate Divide11 and preserve only Divide1d1d. The signature of Divide is:

/(left Decimal, right Decimal) Decimal
/(left Quantity, right Quantity) Quantity

There is no integer overload. We should not be testing one.