Remove redundant Kotlin JVM toolchain configuration from build.gradle.kts

CHANGELOG.md

@@ -9,6 +9,10 @@
 - Migrate IntelliJ Platform repository configuration to `settings.gradle.kts`
 - Dependencies - upgrade `org.jetbrains.intellij.platform` to `2.14.0`
 
+### Removed
+
+- Remove redundant Kotlin JVM toolchain configuration from `build.gradle.kts`
+
 ## [2.4.1] - 2026-03-20
 
 ### Fixed

build.gradle.kts

@@ -14,11 +14,6 @@ plugins {
 group = providers.gradleProperty("pluginGroup").get()
 version = providers.gradleProperty("pluginVersion").get()
 
-// Set the JVM language level used to build the project.
-kotlin {
-    jvmToolchain(21)
-}
-
 // Dependencies are managed with Gradle version catalog - read more: https://docs.gradle.org/current/userguide/version_catalogs.html
 dependencies {
     testImplementation(libs.junit)