Fix warnings

Author: dkhalanskyjb

core/build.gradle.kts

@@ -130,7 +130,7 @@ kotlin {
     sourceSets.all {
         val suffixIndex = name.indexOfLast { it.isUpperCase() }
         val targetName = name.substring(0, suffixIndex)
-        val suffix = name.substring(suffixIndex).toLowerCase().takeIf { it != "main" }
+        val suffix = name.substring(suffixIndex).lowercase().takeIf { it != "main" }
 //        println("SOURCE_SET: $name")
         kotlin.srcDir("$targetName/${suffix ?: "src"}")
         resources.srcDir("$targetName/${suffix?.let { it + "Resources" } ?: "resources"}")
@@ -344,14 +344,11 @@ val downloadWindowsZonesMapping by tasks.registering {
         PrintWriter(bos).use { out ->
             out.println("""// generated with gradle task `$name`""")
             out.println("""package kotlinx.datetime""")
-            out.println("""import kotlin.native.concurrent.SharedImmutable""")
-            out.println("""@SharedImmutable""")
             out.println("""internal val standardToWindows: Map<String, String> = mutableMapOf(""")
             for ((usualName, windowsName) in sortedMapping) {
                 out.println("  \"$usualName\" to \"$windowsName\",")
             }
             out.println(")")
-            out.println("""@SharedImmutable""")
             out.println("""internal val windowsToStandard: Map<String, String> = mutableMapOf(""")
             val reverseMap = sortedMapOf<String, String>()
             for ((usualName, windowsName) in mapping) {

core/linux/test/TimeZoneRulesCompleteTest.kt

@@ -113,7 +113,6 @@ fun parseRfc2822(input: String): Pair<LocalDateTime, String> {
     val abbreviation = input.substringAfterLast(" ")
     val dateTime = input.substringBeforeLast(" ")
     val components = dateTime.split(Regex(" +"))
-    val dayOfWeek = components[0]
     val month = components[1]
     val dayOfMonth = components[2].toInt()
     val time = LocalTime.parse(components[3])

core/windows/src/TimeZoneNative.kt

@@ -57,7 +57,6 @@ internal actual class RegionTimeZone(private val tzid: TimeZoneRules, actual ove
     actual override fun offsetAtImpl(instant: Instant): UtcOffset = tzid.infoAtInstant(instant)
 }
 
-@SharedImmutable
 private val tzdbInRegistry = TzdbInRegistry()
 
 internal actual fun currentTime(): Instant = memScoped {

core/windows/src/WindowsZoneNames.kt

@@ -1,7 +1,5 @@
 // generated with gradle task `downloadWindowsZonesMapping`
 package kotlinx.datetime
-import kotlin.native.concurrent.SharedImmutable
-@SharedImmutable
 internal val standardToWindows: Map<String, String> = mutableMapOf(
   "Africa/Abidjan" to "Greenwich Standard Time",
   "Africa/Accra" to "Greenwich Standard Time",
@@ -465,7 +463,6 @@ internal val standardToWindows: Map<String, String> = mutableMapOf(
   "Pacific/Wallis" to "UTC+12",
   "UTC" to "UTC",
 )
-@SharedImmutable
 internal val windowsToStandard: Map<String, String> = mutableMapOf(
   "AUS Central Standard Time" to "Australia/Darwin",
   "AUS Eastern Standard Time" to "Australia/Sydney",