Kotlin compiler option -Xuse-experimental removed from buildscript.

Signed-off-by: Pavel Erokhin (MairwunNx) <MairwunNx@gmail.com>

Author: MairwunNx

build.gradle

@@ -123,10 +123,3 @@ sourceCompatibility = targetCompatibility =
 
 compileKotlin.kotlinOptions.jvmTarget =
     compileTestKotlin.kotlinOptions.jvmTarget = project_jvm_version_target
-
-//noinspection GroovyAssignabilityCheck
-tasks.withType(org.jetbrains.kotlin.gradle.tasks.KotlinCompile).all {
-    kotlinOptions {
-        freeCompilerArgs += "-Xuse-experimental=kotlin.Experimental"
-    }
-}