Revert "add cleanup dependencies tasks for buildSrc"

This reverts commit 8a8536f8

build.gradle.kts

@@ -5,10 +5,10 @@ import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 import proguard.gradle.ProGuardTask
 
 buildscript {
-
+    extra["defaultSnapshotVersion"] = "1.4-SNAPSHOT"
     val cacheRedirectorEnabled = findProperty("cacheRedirectorEnabled")?.toString()?.toBoolean() == true
 
-    kotlinBootstrapFrom(BootstrapOption.BintrayBootstrap(kotlinBuildProperties.kotlinBootstrapVersion!!, cacheRedirectorEnabled))
+    kotlinBootstrapFrom(BootstrapOption.BintrayBootstrap("1.4.0-dev-1075", cacheRedirectorEnabled))
 
     repositories {
         bootstrapKotlinRepo?.let(::maven)
@@ -28,7 +28,7 @@ buildscript {
     dependencies {
         bootstrapCompilerClasspath(kotlin("compiler-embeddable", bootstrapKotlinVersion))
 
-        classpath("org.jetbrains.kotlin:kotlin-build-gradle-plugin:0.0.13")
+        classpath("org.jetbrains.kotlin:kotlin-build-gradle-plugin:0.0.12")
         classpath("com.gradle.publish:plugin-publish-plugin:0.9.7")
         classpath(kotlin("gradle-plugin", bootstrapKotlinVersion))
         classpath("net.sf.proguard:proguard-gradle:6.1.0")