Native: remove README.md from binary distributions

It is outdated, and the presumed contents are covered by other docs.

kotlin-native/DISTRO_README.md

-# Kotlin/Native  #
-
-_Kotlin/Native_ is a LLVM backend for the Kotlin compiler, runtime
-implementation and native code generation facility using LLVM toolchain.
-
- _Kotlin/Native_ is primarily designed to allow compilation for platforms where
-virtual machines are not desirable or possible (such as iOS, embedded targets),
-or where developer is willing to produce reasonably-sized self-contained program
-without need to ship an additional execution runtime.
-
- _Kotlin/Native_ could be used either as standalone compiler toolchain or as Gradle
-plugin. See [documentation](https://kotlinlang.org/docs/reference/native/gradle_plugin.html)
-for more details on how to use this plugin.
-
-Compile your programs like that:
-
-    export PATH=kotlin-native-<platform>-<version>/bin:$PATH
-	kotlinc hello.kt -o hello
-
-For an optimized compilation use -opt:
-
-	kotlinc hello.kt -o hello -opt
-
-To generate interoperability stubs create library definition file
-(take a look on [Tetris sample](samples/tetris))
-and run `cinterop` tool like this:
-
-    cinterop -def lib.def
-
-See [C interop documentation](https://kotlinlang.org/docs/reference/native/c_interop.html)
-for more information on how to use C libraries from _Kotlin/Native_.
-
-See [`RELEASE_NOTES.md`](https://github.com/JetBrains/kotlin-native/blob/master/RELEASE_NOTES.md) for information on supported platforms and current limitations.

kotlin-native/build.gradle

@@ -625,13 +625,6 @@ configure([bundleRegular, bundlePrebuilt]) {
     dependsOn("crossDistEndorsedCache")
     dependsOn("distSources")
     dependsOn("distDef")
-    from(project.rootDir) {
-        include 'DISTRO_README.md'
-        rename {
-            return "README.md"
-        }
-        into baseName
-    }
     from(project.rootDir) {
         include 'RELEASE_NOTES.md'
         into baseName