Remove deprecated utilities (not deprecated in Node.js)

Author: exoego

app/current/src/main/scala/io/scalajs/nodejs/buffer/package.scala

@@ -45,22 +45,6 @@ package object buffer {
       js.Iterator.IteratorOps(buffer.entries()).toIterator.flatMap(_.lastOption).map(n => f"$n%02x").mkString
   }
 
-  /**
-    * Buffer Extensions
-    */
-  @deprecated("Use io.scalajs.nodejs.buffer package object instead", "v0.10.0")
-  implicit final class BufferObjExtensions(val unused: Buffer.type) extends AnyVal {
-    @deprecated("Use io.scalajs.nodejs.buffer.transcode instead", "v0.10.0")
-    def transcode(source: Uint8Array, fromEnc: String, toEnc: String): Buffer =
-      BufferNamespace.transcode(source, fromEnc, toEnc)
-    @deprecated("Use io.scalajs.nodejs.buffer.INSPECT_MAX_BYTES instead", "v0.10.0")
-    def INSPECT_MAX_BYTES = BufferNamespace.INSPECT_MAX_BYTES
-    @deprecated("Use io.scalajs.nodejs.buffer.kMaxLength instead", "v0.10.0")
-    def kMaxLength = BufferNamespace.kMaxLength
-    @deprecated("Use io.scalajs.nodejs.buffer.constants instead", "v0.10.0")
-    def constants = io.scalajs.nodejs.buffer.constants
-  }
-
   /**
     * Re-encodes the given `Buffer` or `Uint8Array` instance from one character encoding to another.
     * Returns a new `Buffer` instance.

app/current/src/main/scala/io/scalajs/nodejs/os/OSConstants.scala

@@ -1,14 +1,9 @@
 package io.scalajs.nodejs.os
 
 import scala.scalajs.js
-import scala.scalajs.js.annotation.JSBracketAccess
 
 @js.native
 trait OSConstants extends js.Object {
-  @deprecated("Use named members", "v0.10.0")
-  @JSBracketAccess
-  def apply(key: String): js.Any = js.native
-
   val UV_UDP_REUSEADDR: Int         = js.native
   val dlopen: OSDlopenConstants     = js.native
   val errno: OSErrnoConstants       = js.native

app/current/src/main/scala/io/scalajs/nodejs/process/Process.scala

@@ -5,7 +5,7 @@ import io.scalajs.nodejs.events.IEventEmitter
 import io.scalajs.nodejs.tty.{ReadStream, WriteStream}
 
 import scala.scalajs.js
-import scala.scalajs.js.annotation.{JSBracketAccess, JSGlobal}
+import scala.scalajs.js.annotation.JSGlobal
 import scala.scalajs.js.|
 
 /**
@@ -481,10 +481,6 @@ trait ResourceUsage extends js.Object {
 
 @js.native
 trait Features extends js.Object {
-  @deprecated("Use named members", "v0.10.0")
-  @JSBracketAccess
-  def apply(key: String): Boolean = js.native
-
   val debug: Boolean    = js.native
   val uv: Boolean       = js.native
   val ipv6: Boolean     = js.native

app/current/src/main/scala/io/scalajs/nodejs/process/package.scala

@@ -13,9 +13,6 @@ package object process {
   type ExitCode         = Int
   type SendHandle       = net.Socket | net.Server
 
-  @deprecated("Use io.scalajs.nodejs.Error", "v0.10.0")
-  type Warning = Error
-
   /**
     * Process Object Extensions
     * @param process the given [[Process process]]

app/current/src/main/scala/io/scalajs/util/NodeJSConverters.scala

@@ -122,30 +122,18 @@ class BufferTest extends AnyFunSpec {
         // package object method
         assert(buffer.transcode(Buffer.from("hello"), "utf8", "ascii").toString("ascii") === "hello")
         assert(buffer.transcode(Buffer.from("€"), "utf8", "ascii").toString("ascii") === "?")
-
-        // extension method
-        assert(Buffer.transcode(Buffer.from("hello"), "utf8", "ascii").toString("ascii") === "hello")
-        assert(Buffer.transcode(Buffer.from("€"), "utf8", "ascii").toString("ascii") === "?")
       }
 
       it("should support fields") {
         // package object method
         assert(buffer.INSPECT_MAX_BYTES > 0)
         assert(buffer.kMaxLength > 0)
-
-        // extension method
-        assert(Buffer.INSPECT_MAX_BYTES > 0)
-        assert(Buffer.kMaxLength > 0)
       }
 
       it("should support constants") {
         // package object method
         assert(buffer.constants.MAX_LENGTH > 0)
         assert(buffer.constants.MAX_STRING_LENGTH > 0)
-
-        // extension method
-        assert(Buffer.constants.MAX_LENGTH > 0)
-        assert(Buffer.constants.MAX_STRING_LENGTH > 0)
       }
     }
   }

app/nodejs-v10/src/test/scala/io/scalajs/nodejs/buffer/BufferTest.scala

@@ -3,7 +3,6 @@ package child_process
 
 import io.scalajs.nodejs.buffer.Buffer
 import io.scalajs.nodejs.TestHelper._
-import io.scalajs.util.NodeJSConverters._
 
 import scala.concurrent.{ExecutionContext, Promise}
 import scala.scalajs.js

app/nodejs-v10/src/test/scala/io/scalajs/nodejs/child_process/ChildProcessTest.scala

@@ -1,7 +1,6 @@
 package io.scalajs.nodejs.fs
 
 import io.scalajs.nodejs.setImmediate
-import io.scalajs.util.NodeJSConverters._
 import io.scalajs.nodejs.TestHelper._
 
 import scala.concurrent.{ExecutionContext, Promise}