*Replace this paragraph with a description of what this PR is changing or adding, and why. Consider including before/after screenshots.*
*List which issues are fixed by this PR. You must list at least one issue. An issue is not required if the PR fixes something trivial like a typo.*
*If you had to change anything in the [flutter/tests] repo, include a link to the migration guide as per the [breaking change policy].*
- [] I listed at least one issue that this PR fixes in the description above.
- [] I added new tests to check the change I am making, or this PR is [test-exempt].
- [] I followed the [breaking change policy] and added [Data Driven Fixes] where supported.
- [] All existing and new tests are passing.
## Detail
The correct parameter is --web-port, not --webport
We have fiddled with this a bunch, and there is definitively no way to reliably include this, so I am removing it.
Since CI does not cover all possible values, we can't consistently look up images for local testing. We thought removing it from the look up would work fine, and it did for most tests, but there were still some that could not find an image without it.
A brief history on the abi key
- added in https://github.com/flutter/flutter/pull/143621
- disabled in https://github.com/flutter/flutter/pull/148023
- added back in https://github.com/flutter/flutter/pull/148072
- we thought there was only an issue with alphabetizing keys
- removed from local image look up in https://github.com/flutter/flutter/pull/149696
I updated the docs page to also discuss what makes a good key and what does not based on what we learned here.
