chore: simplify MiddlewareRenderable (#350)

Author: wooj2

smithy-swift-codegen/src/main/kotlin/software/amazon/smithy/swift/codegen/integration/middlewares/LoggingMiddleware.kt

@@ -29,14 +29,10 @@ class LoggingMiddleware : MiddlewareRenderable {
         op: OperationShape,
         operationStackName: String
     ) {
-        writer.write("$operationStackName.${middlewareStep.stringValue()}.intercept(position: ${position.stringValue()}, middleware: \$N(${middlewareParamsString(model, symbolProvider, op)}))", ClientRuntimeTypes.Middleware.LoggerMiddleware)
+        writer.write("$operationStackName.${middlewareStep.stringValue()}.intercept(position: ${position.stringValue()}, middleware: \$N(${middlewareParamsString()}))", ClientRuntimeTypes.Middleware.LoggerMiddleware)
     }
 
-    override fun middlewareParamsString(
-        model: Model,
-        symbolProvider: SymbolProvider,
-        op: OperationShape
-    ): String {
+    private fun middlewareParamsString(): String {
         return "clientLogMode: config.clientLogMode"
     }
 }

smithy-swift-codegen/src/main/kotlin/software/amazon/smithy/swift/codegen/middleware/MiddlewareRenderable.kt

@@ -23,6 +23,4 @@ interface MiddlewareRenderable {
     val position: MiddlewarePosition
 
     fun render(model: Model, symbolProvider: SymbolProvider, writer: SwiftWriter, op: OperationShape, operationStackName: String)
-
-    fun middlewareParamsString(model: Model, symbolProvider: SymbolProvider, op: OperationShape): String { return "" }
 }