Revert "Build: Publish backend.native.jar to a local repo"

This reverts commit d886986b96.
It breaks CLI launcher.

backend.native/build.gradle

@@ -19,10 +19,6 @@ apply plugin: "com.google.protobuf"
 apply plugin: 'java'
 apply plugin: 'kotlin'
 apply plugin: org.jetbrains.kotlin.NativeInteropPlugin
-apply plugin: "maven-publish"
-
-group = 'org.jetbrains.kotlin'
-version = konanVersionFull
 
 // (gets applied to this project and all its subprojects)
 allprojects {
@@ -293,15 +289,3 @@ task debugCompiler(type: JavaExec) {
     enableAssertions = true
     args = findProperty("konan.debug.args").toString().tokenize() ?: []
 }
-
-publishing {
-    repositories {
-        maven { url = "$buildDir/repo" }
-    }
-
-    publications {
-        maven(MavenPublication) {
-            from components.java
-        }
-    }
-}