Remove Hamcrest from project files

[jamesonwilliams]

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Description

We recently removed references to Hamcrest in the test files. This is the last bit of cleanup to remove it from the project files.

Hamcrest is still brought into this project as a transitive dependency of JUnit 4.x. So I've retained the licensing notice since it is in the classpath closure. But, it is no longer in any build.gradle.

To update the verification-metadata.xml, I did

perl -0777 -pi -e 's|<components>.*?</components>|<components>\n</components>|gs' gradle/verification-metadata.xml 
./gradlew qa --write-verification-metadata sha256 

(And then added back the mysterious junit-bom...)

[greyson-signal]

Awesome, thank you! That verification-metadata.xml update script is also clever, I'll stash that away somewhere :) Only downside is that there's one dependency (aapt) that has specific osx/linux/windows variants, so gotta add those back (already did it), but that's not that bad.