Remove useless files

mirai-core-qqandroid/src/androidMain/kotlin/net/mamoe/mirai/qqandroid/utils/cryptor/arraycopy.kt

-package net.mamoe.mirai.qqandroid.utils.cryptor
-
-internal actual fun arraycopy(
-    src: ByteArray,
-    srcPos: Int,
-    dest: ByteArray,
-    destPos: Int,
-    length: Int
-) = System.arraycopy(src, srcPos, dest, destPos, length)
\ No newline at end of file

mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/utils/cryptor/MultiMsgCryptor.kt

-/*
- * Copyright 2020 Mamoe Technologies and contributors.
- *
- * 此源代码的使用受 GNU AFFERO GENERAL PUBLIC LICENSE version 3 许可证的约束, 可以在以下链接找到该许可证.
- * Use of this source code is governed by the GNU AGPLv3 license that can be found through the following link.
- *
- * https://github.com/mamoe/mirai/blob/master/LICENSE
- */
-
-package net.mamoe.mirai.qqandroid.utils.cryptor
-
-import net.mamoe.mirai.utils.io.toUHexString
-
-internal object MultiMsgCryptor {
-    private val impl = class_1457()
-
-    fun decrypt(data: ByteArray, offset: Int, length: Int, key: ByteArray): ByteArray {
-        return this.impl.method_67425(data, offset, length, key) ?: error("MultiMsgCryptor decypt failed: key=${key.toUHexString()}, data=${data.drop(offset).take(length).toByteArray().toUHexString()}")
-    }
-
-    fun decrypt(data: ByteArray, key: ByteArray): ByteArray {
-        return this.impl.method_67426(data, key) ?: error("MultiMsgCryptor decrypt failed: key=${key.toUHexString()}, data=${data.toUHexString()}")
-    }
-
-    fun enableResultRandom(enabled: Boolean) {
-        this.impl.method_67424(enabled)
-    }
-
-    fun encrypt(data: ByteArray, key: ByteArray): ByteArray {
-        return this.impl.method_67427(data, key)
-    }
-}
\ No newline at end of file

mirai-core-qqandroid/src/jvmMain/kotlin/net/mamoe/mirai/qqandroid/utils/cryptor/arraycopy.kt

-package net.mamoe.mirai.qqandroid.utils.cryptor
-
-internal actual fun arraycopy(
-    src: ByteArray,
-    srcPos: Int,
-    dest: ByteArray,
-    destPos: Int,
-    length: Int
-) = System.arraycopy(src, srcPos, dest, destPos, length)
\ No newline at end of file