fcde4f6577
Remove a redundant `lookupOrDefault` that has no effect. When no type is passed to `lookupOrDefault`, that function returns the furthest mapped value (by following the mapping iteratively). If there is no mapped value with the desired type, then the function also returns the furthest mapped value. The value that was passed to the redundant `lookupOrDefault` was produced by this code: ``` Value newOperand = mapping.lookupOrDefault(operand, desiredType); ``` There are 2 possible cases: - Case 1: There is no mapping to `desiredType`. Then `newOperand` is the furthest mapped value. - Case 2: There is a mapping to `desiredType`. Then the type of `newOperand` is `desiredType` and the "if" branch that encloses the redundant `lookupOrDefault` is not executed at all. Also improve the documentation of `ConversionValueMapping::lookupOrDefault` and simplify the implementation a bit.
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