Don't repeat tests

[AdrienVannson]

Summary

test_inputs.py used to include some mechanism to repeat tests several times. I don't see any reasons for this since serializing / deserializing messages is deterministic. This option was not used anyway: repeat always had a value of 1.

Checklist

• If code changes were made then they have been tested.

[Gobot1234]

I don't see a problem with leaving this in

[AdrienVannson]

I don't see any reason to repeat the test, since everything here is fully deterministic. More importantly, this feature is not used at all: the test is always executed only one single time.

Even if, one day, repeating tests is needed, there are much simpler ways to do it (see https://stackoverflow.com/questions/21764473/how-can-i-repeat-each-test-multiple-times-in-a-py-test-run )

It is not a big change, but I am trying as much as I can to simplify the current implementation of betterproto. For now, I have to say that the code is quite messy and many simple changes can become painful because of this :)

[Gobot1234]

I'm just seeing it as a connivence thing if someone wants to check that something they've written doesn't depend on execution order or something like class level state. I'm overall though fairly neutral on this however

[cetanu]

my opinion: we can always add it back if we need it, and perhaps it will be improved the second time around