Remove Scala compiler from libraryDependencies

[y-yu]

• I cannot use sbt-heroku in Scala 3 project due to this error:

  [info] [error] sbt.librarymanagement.ResolveException: Error downloading org.scala-lang:scala-compiler:3.0.1
  [info] [error]   Not found
  [info] [error]   Not found
  [info] [error]   not found: /Users/yyu/.ivy2/local/org.scala-lang/scala-compiler/3.0.1/ivys/ivy.xml

• Actually I didn't know why scala-compiler had been added to libraryDependencies 🤔
• I add Scala 3 + akka-http test
• Work around:
  • https://github.com/y-yu/kindle-clock/blob/4d0877076cd95bbe0d75046f0691327680fad908/build.sbt#L158-L163

[y-yu]

How do I do to run CI? 🤔

[xuwei-k]

1bd2bbd
🤔

[DanielDispatchIT]

Looks good! Let's see if we can get someone to merge the PR. I have the same issue and this fix would be great.

[y-yu]

@Malax
Please check Circle CI setting of this repository 🙏

[edmorley]

(I'm about to enable review reminder for team-alias reviews, so I'm switching any reviews that need language-owner review to the owner directly, to prevent reminders the rest of the team can't action)

[y-yu]

I will remove akka dependencies in test due to the license change: akka/akka#31561 .

[Malax]

Closing this PR because this repository will be archived. See https://github.com/heroku/heroku-jvm-application-deployer for an alternative CLI to deploy locally compiled Scala applications.