Remove HA indexer integration test on H2

This test was supposed to always fail, but sometimes it passes

changelog_begin
changelog_end

ledger/participant-integration-api/src/test/lib/scala/platform/indexer/ha/IndexerStabilitySpec.scala

@@ -16,7 +16,6 @@ import org.scalatest.time.{Millis, Seconds, Span}
 
 import java.sql.Connection
 import scala.concurrent.{ExecutionContext, Future}
-import scala.util.Success
 
 trait IndexerStabilitySpec
     extends AsyncFlatSpec
@@ -29,8 +28,6 @@ trait IndexerStabilitySpec
   // To be overriden by the spec implementation
   def jdbcUrl: String
 
-  def haModeSupported: Boolean
-
   // The default EC is coming from AsyncTestSuite and is serial, do not use it
   implicit val ec: ExecutionContext = system.dispatcher
   private implicit val loggingContext: LoggingContext = LoggingContext.ForTesting
@@ -104,15 +101,6 @@ trait IndexerStabilitySpec
         Future.successful(())
       }
       .map(_ => succeed)
-  }.transform { result =>
-    if (haModeSupported) {
-      result
-    } else {
-      // If HA mode is not supported, the test must fail, but there are multiple reasons why it can fail.
-      // E.g., duplicate parameter table initialization, or duplicate event sequential ids.
-      assert(result.isFailure, "The test must fail if HA mode is not supported")
-      Success(succeed)
-    }
   }
 
   // Finds the first non-aborted indexer that has subscribed to the ReadService stream

ledger/participant-integration-api/src/test/suite/scala/platform/indexer/ha/IndexerStabilityOracleSpec.scala

@@ -9,5 +9,4 @@ final class IndexerStabilityOracleSpec extends IndexerStabilitySpec with OracleA
 
   override def jdbcUrl: String =
     s"jdbc:oracle:thin:$oracleUser/$oraclePwd@localhost:$oraclePort/ORCLPDB1"
-  override def haModeSupported: Boolean = true
 }

ledger/participant-integration-api/src/test/suite/scala/platform/indexer/ha/IndexerStabilityPostgresSpec.scala

@@ -8,5 +8,4 @@ import com.daml.testing.postgresql.PostgresAroundEach
 final class IndexerStabilityPostgresSpec extends IndexerStabilitySpec with PostgresAroundEach {
 
   override def jdbcUrl: String = postgresDatabase.url
-  override def haModeSupported: Boolean = true
 }