Simplify initClient function and clean imports in SseIntegrationTest.

Author: devcrocod

kotlin-sdk-test/src/commonTest/kotlin/io/modelcontextprotocol/kotlin/sdk/integration/SseIntegrationTest.kt

@@ -1,7 +1,6 @@
 package io.modelcontextprotocol.kotlin.sdk.integration
 
 import io.ktor.client.HttpClient
-import io.ktor.client.plugins.sse.SSE
 import io.ktor.server.application.install
 import io.ktor.server.cio.CIOApplicationEngine
 import io.ktor.server.engine.EmbeddedServer
@@ -44,9 +43,9 @@ class SseIntegrationTest {
         }
     }
 
-    private suspend fun initClient(port: Int): Client {
-        return HttpClient(ClientCIO) { install(ClientSSE) }.mcpSse("http://$URL:$port")
-    }
+    private suspend fun initClient(port: Int): Client = HttpClient(ClientCIO) {
+        install(ClientSSE)
+    }.mcpSse("http://$URL:$port")
 
     private suspend fun initServer(): EmbeddedServer<CIOApplicationEngine, CIOApplicationEngine.Configuration> {
         val server = Server(