Julien Pivotto 577e738986 Cleanup PromQL functions (#6551)
* Cleanup PromQL functions

The engine ensures, for Matrix functions, that functions are called with exactly one series at the time.
Therefore a lot of code can be inlined and we can directly assume the first element of the arguments exists and contains all the samples needed.

Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu>
2020-01-06 10:33:36 +00:00
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