[Gradle] Remove unused variable

^KT-56904 In Progress

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/targets/js/npm/GradleNodeModuleBuilder.kt

@@ -80,8 +80,6 @@ internal class GradleNodeModuleBuilder(
         // yarn requires semver
         packageJson.version = fixSemver(packageJson.version)
 
-        val actualFiles = files.filterNot { it.name.endsWith(".$META_JS") }
-
         return makeNodeModule(cacheDir, packageJson) { nodeModule ->
             fs.copy { copy ->
                 copy.from(fileTrees)