Minor, remove obsolete jdkPath

libraries/commonConfiguration.gradle

@@ -1,19 +1,3 @@
-String jdkPath(String version) {
-    String varName = "JDK_${version.replace('.', '')}"
-    String path = System.getenv(varName)
-    if (path == null) throw new GradleException("Please set environment variable $varName to point to JDK $version installation")
-    return path
-}
-
-//ext {
-//    JDK_16 = jdkPath("1.6")
-//    JDK_17 = jdkPath("1.7")
-//    JDK_18 = jdkPath("1.8")
-//    distDir = file("$kotlin_root/dist")
-//    distLibDir = file("$kotlin_root/dist/kotlinc/lib")
-//    bootstrapCompilerFile = file("$distDir/kotlin-compiler-for-maven.jar")
-//}
-
 ext.configureJvmProject = { Project project ->
     project.configure(project) {
         task sourcesJar(type: Jar, dependsOn: classes) {