Native: fix curl sample test

Don't publish libcurl to a local Maven repo, but consume it directly
as a project dependency.

Publishing appears to be fragile here, and the intention of the test
does not involve checking Gradle anyway.

kotlin-native/backend.native/tests/samples/libcurl/build.gradle.kts

@@ -1,21 +1,5 @@
 plugins {
     kotlin("multiplatform")
-    `maven-publish`
-}
-
-group = "org.jetbrains.kotlin.sample.native"
-version = "1.0"
-
-val localRepo = rootProject.file("build/.m2-local")
-
-publishing {
-    repositories {
-        maven("file://$localRepo")
-    }
-}
-
-val cleanLocalRepo by tasks.creating(Delete::class) {
-    delete(localRepo)
 }
 
 val mingwPath = File(System.getenv("MINGW64_DIR") ?: "C:/msys64/mingw64")
@@ -43,16 +27,6 @@ kotlin {
                 }
             }
         }
-
-        mavenPublication {
-            pom {
-                 withXml {
-                     val root = asNode()
-                     root.appendNode("name", "libcurl interop library")
-                     root.appendNode("description", "A library providing interoperability with host libcurl")
-                 }
-            }
-        }
     }
 
     // Enable experimental stdlib API used by the sample.