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

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.