Remove unused import in DistributionInternal

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Co-Authored-By: Claude <noreply@anthropic.com>

Author: runningcode

sentry-android-distribution/src/main/java/io/sentry/android/distribution/internal/DistributionInternal.kt

@@ -3,7 +3,6 @@ package io.sentry.android.distribution.internal
 import android.content.Context
 import io.sentry.android.distribution.DistributionOptions
 import io.sentry.android.distribution.UpdateStatus
-import java.util.concurrent.CompletableFuture
 
 /** Internal implementation for build distribution functionality. */
 internal object DistributionInternal {