Remove the extractSummary methods in test case

[Mistyyyy]

What kind of change does this PR introduce?

Test cases about entry and stats

Did you add tests for your changes?

already exist

If relevant, did you update the documentation?

NA

Summary

Does this PR introduce a breaking change?

No

Other information

NA

[Mistyyyy]

I think before each test run, we should clean the output info which may contain the previous test result. I encountered this problem when I run the test cases, I get the incorrect test results.

[webpack-bot]

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[anshumanv]

Hi, thanks for your contribution.

What's the motivation for this change? Is there some discussion that I've missed? :)

[Mistyyyy]

@anshumanv The discussion is here #1289

[ematipico]

@anshumanv basically the default output of webpack is changed. That nice output should not be here in the CLI (it should be in webpack side). So in one of my previous PRs I removed moved into --pretty and doing so I had to revisit most of the tests. These ones slipped from my eyesight and this PR is to fix them!

I am going to make a new PR to remove --pretty because we don't need it.