fix compile error

booster-transform-thread/src/main/kotlin/com/didiglobal/booster/transform/thread/ThreadTransformer.kt

@@ -172,7 +172,7 @@ class ThreadTransformer : ClassTransformer {
             (it.opcode == Opcodes.INVOKESPECIAL) &&
                     (it is MethodInsnNode) &&
                     (this.desc == it.owner && "<init>" == it.name)
-        }?.let { init: AbstractInsnNode ->
+        }?.let { init ->
             if (init !is MethodInsnNode) return
             val name = "new${prefix.capitalize()}${this.desc.substringAfterLast('/')}"
             val desc = "${init.desc.substringBeforeLast(')')}Ljava/lang/String;)L${this.desc};"