test: remove undocumented and undefined usage of req.reject

[schwma]

fixes issue mentioned in #185

(closes #185)

[danjoa]

No, this also does not address the intent: We need to clarify the expected API behaviour instead:
What do we expect when we call an i18n.at(key,locale?,args?) function with only key, or key and locale, but no args?

• Option 1: the text from the bundle as is, i.e., without args applied?
• Option 2: the text from the bundle with all args filled with 'NULL'?

As option 2 has little value if any at all, I clearly vote for Option 1.
And as we haven't clarified that in @sap/cds, and your graphql tests should not have any expectations in that regard (why should it?), let's just remove this test please.

[schwma]

I see, thanks for the clarification! I will remove the test 👍