Fix linter errors in test/e2e-coinjoin-test.py

[kristapsk]

test/e2e-coinjoin-test.py:20:1: F401 'random' imported but unused
test/e2e-coinjoin-test.py:28:1: F401 'jmclient.wallet_utils.wallet_gettimelockaddress' imported but unused

[AdamISZ]

Thanks, I usually remember to do flake8 locally but I keep forgetting to add test/ to it. I can't remember, but I'm guessing we didn't add it to CI because something in there fails?

(Btw reminds me: I'll just remove test/test_full_coinjoin.py now we have this new e2e* test which does a similar job, though I'm not sure whether to add it to the test suite).

[kristapsk]

Thanks, I usually remember to do flake8 locally but I keep forgetting to add test/ to it.

./test/lint/lint-python.sh :)

I can't remember, but I'm guessing we didn't add it to CI because something in there fails?

Not sure either, could try add in #1218.

[kristapsk]

though I'm not sure whether to add it to the test suite

Why not?

[AdamISZ]

though I'm not sure whether to add it to the test suite

Why not?

Yeah I couldn't remember offhand; investigating now. Hopefully we can.

[AdamISZ]

Going to merge this now so I can base #1230 off it, where I will also address the point above (adding the e2e test into it).