microdroid_manager: Fix duplicate error log

The returned error is logged in `main`.

Test: atest MicrodroidHostTestCases
Change-Id: I9554d223aacafd29a6e04ee5038fb0a0e6eae0a5
diff --git a/microdroid_manager/src/main.rs b/microdroid_manager/src/main.rs
index e4694e8..557a379 100644
--- a/microdroid_manager/src/main.rs
+++ b/microdroid_manager/src/main.rs
@@ -190,7 +190,6 @@
             Ok(())
         }
         Err(err) => {
-            error!("task terminated: {:?}", err);
             let (error_code, message) = translate_error(&err);
             service.notifyError(error_code, &message)?;
             Err(err)