Merge #21117: test: remove assert_blockchain_height
fa0a4d6c605b8ed47796f68068d6273bef7fcaef test: remove assert_blockchain_height (MarcoFalke)
Pull request description:
This simplifies the code and solves intermittent timeouts caused by commit 0d39b5848a7a341cd2b958336861cdd4098e2616.
E.g. https://cirrus-ci.com/task/5196092369272832?command=ci#L3126
```
test 2021-02-08T12:27:56.275000Z TestFramework (ERROR): Assertion failed
Traceback (most recent call last):
File "/tmp/cirrus-ci-build/ci/scratch/build/bitcoin-x86_64-pc-linux-gnu/test/functional/test_framework/test_framework.py", line 127, in main
self.run_test()
File "/tmp/cirrus-ci-build/ci/scratch/build/bitcoin-x86_64-pc-linux-gnu/test/functional/feature_assumevalid.py", line 180, in run_test
self.assert_blockchain_height(self.nodes[0], 101)
File "/tmp/cirrus-ci-build/ci/scratch/build/bitcoin-x86_64-pc-linux-gnu/test/functional/feature_assumevalid.py", line 92, in assert_blockchain_height
assert False, "blockchain too short after timeout: %d" % current_height
AssertionError: blockchain too short after timeout: 101
ACKs for top commit:
glozow:
ACK fa0a4d6c60
Tree-SHA512: 3859b0c1581c21f03c775f119204cc3a219e5d86346883634886f6da46feaf254b9c6c49c1ec4581ffe409cdf05f6e91ec38c3976c3daf4a9e67f96ddc1e0dce
