Perform some code refactor

modules/io/src/main/kotlin/io/smnp/ext/io/IoModule.kt

@@ -1,15 +1,10 @@
 package io.smnp.ext.io
 
-import io.smnp.callable.method.Method
 import io.smnp.ext.ModuleDefinition
 import io.smnp.ext.io.function.PrintlnFunction
 import org.pf4j.Extension
 
 @Extension
-class IoModule : ModuleDefinition {
-    override fun modulePath() = "smnp.io"
-
+class IoModule : ModuleDefinition("smnp.io") {
     override fun functions() = listOf(PrintlnFunction())
-
-    override fun methods() = emptyList<Method>()
 }