treewide: remove duplicate test_output flag

Change-Id: Ia45b46dbbdb2daad2da33094acfe047b6ad09ab3
Reviewed-on: https://review.monogon.dev/c/monogon/+/3673
Tested-by: Jenkins CI
Reviewed-by: Lorenz Brun <lorenz@monogon.tech>
diff --git a/.bazelrc b/.bazelrc
index 8073a2f..ec9a630 100644
--- a/.bazelrc
+++ b/.bazelrc
@@ -72,7 +72,6 @@
 
 # Build resources
 startup --batch_cpu_scheduling --io_nice_level 7
-test --test_output=errors
 
 # selinux:
 #     build with SELinux (containerd, kubelet)