[Kotlin] Remove download benchmark files dependency (#7314)

There was a step in the compilation process where benchmark data is
downloaded before starting the kotlin compilation process.

Since we are not running benchmark on CI anymore, we remove the
dependency. To run benchmarks the download task needs to be executed
manually.
diff --git a/kotlin/benchmark/build.gradle.kts b/kotlin/benchmark/build.gradle.kts
index 0f2829e..8595c02 100644
--- a/kotlin/benchmark/build.gradle.kts
+++ b/kotlin/benchmark/build.gradle.kts
@@ -76,7 +76,3 @@
   dest(File("${project.projectDir.absolutePath}/src/jvmMain/resources"))
   overwrite(false)
 }
-
-project.tasks.named("compileKotlinJvm") {
-  dependsOn("downloadMultipleFiles")
-}