remove more uses of ActorMaterializer · apache/pekko-http@cd75b5f

Compile everything: parsing/src/main/scala-2/org/apache/pekko/http/ccompat/pre213macro.scala#L17

Unused import

Compile everything: parsing/src/main/scala-2/org/apache/pekko/http/ccompat/since213macro.scala#L17

Unused import

Compile everything: http-scalafix/scalafix-rules/src/main/scala/org/apache/pekko/http/fix/MigrateToServerBuilder.scala#L31

method args in trait Apply is deprecated: 4.6.0

Compile everything: http-scalafix/scalafix-rules/src/main/scala/org/apache/pekko/http/fix/MigrateToServerBuilder.scala#L45

method args in trait Apply is deprecated: 4.6.0

Compile everything: http-core/src/main/scala/org/apache/pekko/http/impl/engine/client/PoolInterface.scala#L232

parameter ec in method shutdown is never used

Compile everything: http-core/src/main/scala/org/apache/pekko/http/scaladsl/model/HttpEntity.scala#L666

method getFirst in class Attributes is deprecated (since Akka 2.5.7): Attributes should always be most specific, use get[T]

Compile everything: http-core/src/main/scala/org/apache/pekko/http/impl/engine/http2/Http2Multiplexer.scala#L170

@nowarn annotation does not suppress any warnings

Compile everything: http-core/src/main/scala/org/apache/pekko/http/javadsl/settings/ParserSettings.scala#L141

@nowarn annotation does not suppress any warnings

Compile everything: http-core/src/main/scala/org/apache/pekko/http/scaladsl/Http.scala#L192

@nowarn annotation does not suppress any warnings

Compile everything: http-core/src/main/scala/org/apache/pekko/http/scaladsl/Http.scala#L241

@nowarn annotation does not suppress any warnings

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