removed unused variable

Author: Raival-e

app/src/main/java/com/raival/compose/file/explorer/screen/main/tab/files/task/ApksMergeTask.kt

@@ -164,7 +164,7 @@ class ApksMergeTask(
                 listOf(certificate)
             ).build()
 
-            val apkSigner = ApkSigner.Builder(listOf(signerConfig))
+            ApkSigner.Builder(listOf(signerConfig))
                 .setInputApk(inputFile)
                 .setOutputApk(outputFile)
                 .setV1SigningEnabled(true)