build: remove Scala 2-only compiler options from Scala 3 projects

Motivation:
All sample projects use Scala 3.3.7 but several still include Scala 2
compiler options (-Xlog-reflective-calls, -Xlint, -Ywarn-unused:imports)
that produce "bad option" warnings or are silently ignored.

Modification:
Remove -Xlog-reflective-calls, -Xlint (without arguments), and
-Ywarn-unused:imports from scalacOptions in 10 sample build.sbt files.
Keep -deprecation, -feature, -unchecked which are valid in both Scala 2 and 3.

Result:
Clean compilation without "bad option" warnings in all affected samples.

Author: He-Pin

pekko-sample-cluster-client-grpc-scala/build.sbt

@@ -14,9 +14,7 @@ lazy val `pekko-sample-cluster-client-grpc-scala` = project
     Compile / scalacOptions ++= Seq(
       "-deprecation",
       "-feature",
-      "-unchecked",
-      "-Xlog-reflective-calls",
-      "-Xlint"),
+      "-unchecked"),
     Compile / javacOptions ++= Seq("-Xlint:unchecked", "-Xlint:deprecation"),
     // javaAgents += "org.mortbay.jetty.alpn" % "jetty-alpn-agent" % "2.0.9" % "runtime",
     libraryDependencies ++= Seq(

pekko-sample-cluster-docker-compose-java/build.sbt

@@ -7,8 +7,7 @@ scalaVersion := "3.3.7"
 scalacOptions ++= Seq(
   "-deprecation",
   "-unchecked",
-  "-encoding", "UTF-8",
-  "-Xlint")
+  "-encoding", "UTF-8")
 
 val pekkoVersion = "1.5.0"
 val logbackVersion = "1.3.15"

pekko-sample-cluster-docker-compose-scala/build.sbt

@@ -8,8 +8,7 @@ scalaVersion := "3.3.7"
 scalacOptions ++= Seq(
   "-deprecation",
   "-unchecked",
-  "-encoding", "UTF-8",
-  "-Xlint")
+  "-encoding", "UTF-8")
 
 val pekkoVersion = "1.5.0"
 val logbackVersion = "1.3.15"

pekko-sample-cluster-java/build.sbt

@@ -10,7 +10,7 @@ lazy val `pekko-sample-cluster-java` = project
   .settings(
     organization := "org.apache.pekko",
     scalaVersion := "3.3.7",
-    Compile / scalacOptions ++= Seq("-deprecation", "-feature", "-unchecked", "-Xlog-reflective-calls", "-Xlint"),
+    Compile / scalacOptions ++= Seq("-deprecation", "-feature", "-unchecked"),
     Compile / javacOptions ++= Seq("-parameters", "-Xlint:unchecked", "-Xlint:deprecation"),
     run / javaOptions ++= Seq("-Xms128m", "-Xmx1024m", "-Djava.library.path=./target/native"),
     libraryDependencies ++= Seq(

pekko-sample-cluster-scala/build.sbt

@@ -10,7 +10,7 @@ lazy val `pekko-sample-cluster-scala` = project
   .settings(
     organization := "org.apache.pekko",
     scalaVersion := "3.3.7",
-    Compile / scalacOptions ++= Seq("-deprecation", "-feature", "-unchecked", "-Xlog-reflective-calls", "-Xlint"),
+    Compile / scalacOptions ++= Seq("-deprecation", "-feature", "-unchecked"),
     Compile / javacOptions ++= Seq("-Xlint:unchecked", "-Xlint:deprecation"),
     run / javaOptions ++= Seq("-Xms128m", "-Xmx1024m", "-Djava.library.path=./target/native"),
     libraryDependencies ++= Seq(

pekko-sample-distributed-data-java/build.sbt

@@ -11,7 +11,7 @@ val `pekko-sample-distributed-data-java` = project
     organization := "org.apache.pekko",
     version := "1.0",
     scalaVersion := "3.3.7",
-    Compile / scalacOptions ++= Seq("-deprecation", "-feature", "-unchecked", "-Xlog-reflective-calls", "-Xlint"),
+    Compile / scalacOptions ++= Seq("-deprecation", "-feature", "-unchecked"),
     Compile / javacOptions ++= Seq("-parameters", "-Xlint:unchecked", "-Xlint:deprecation", "-Xdiags:verbose"),
     run / javaOptions ++= Seq("-Xms128m", "-Xmx1024m"),
     libraryDependencies ++= Seq(

pekko-sample-distributed-data-scala/build.sbt

@@ -11,7 +11,7 @@ val `pekko-sample-distributed-data-scala` = project
     organization := "org.apache.pekko",
     version := "1.0",
     scalaVersion := "3.3.7",
-    Compile / scalacOptions ++= Seq("-deprecation", "-feature", "-unchecked", "-Xlog-reflective-calls", "-Xlint"),
+    Compile / scalacOptions ++= Seq("-deprecation", "-feature", "-unchecked"),
     Compile / javacOptions ++= Seq("-Xlint:unchecked", "-Xlint:deprecation"),
     run / javaOptions ++= Seq("-Xms128m", "-Xmx1024m"),
     libraryDependencies ++= Seq(

pekko-sample-kafka-to-sharding-scala/build.sbt

@@ -12,9 +12,7 @@ ThisBuild / organization := "org.apache.pekko"
 ThisBuild / Compile / scalacOptions ++= Seq(
   "-deprecation",
   "-feature",
-  "-unchecked",
-  "-Xlog-reflective-calls",
-  "-Xlint")
+  "-unchecked")
 ThisBuild / Compile / javacOptions ++= Seq("-Xlint:unchecked", "-Xlint:deprecation")
 ThisBuild / Test / testOptions += Tests.Argument("-oDF")
 ThisBuild / licenses := Seq(("CC0", url("http://creativecommons.org/publicdomain/zero/1.0")))

pekko-sample-persistence-scala/build.sbt

@@ -13,7 +13,7 @@ libraryDependencies ++= Seq(
   "org.apache.pekko" %% "pekko-actor-testkit-typed" % pekkoVersion % Test,
   "org.scalatest" %% "scalatest" % "3.2.19" % Test)
 
-Compile / scalacOptions ++= Seq("-deprecation", "-feature", "-unchecked", "-Xlog-reflective-calls", "-Xlint")
+Compile / scalacOptions ++= Seq("-deprecation", "-feature", "-unchecked")
 
 // show full stack traces and test case durations
 Test / testOptions += Tests.Argument("-oDF")

pekko-sample-sharding-scala/build.sbt

@@ -10,8 +10,6 @@ lazy val commonScalacOptions = Seq(
   "-deprecation",
   "-feature",
   "-unchecked",
-  "-Xlint",
-  "-Ywarn-unused:imports",
   "-encoding", "UTF-8")
 
 lazy val commonJavacOptions = Seq(