.bazelrc: remove hardcoded resource constraints

Let Bazel figure out the appropriate number of jobs and RAM by itself.
This should improve default build performance on large machines.

One possible caveat: we use genrules that consume excessive CPU
on their own (i.e. edk2, kernel...), and removing the jobs limit
might cause worse resource contention in some scenarios - but
from limited testing, this does not appear to be a problem.

Change-Id: Ib96d7953b6530fe202f8b7b0aa160cc7e2f2c35c
Reviewed-on: https://review.monogon.dev/c/monogon/+/1070
Tested-by: Jenkins CI
Reviewed-by: Serge Bazanski <serge@monogon.tech>
diff --git a/.bazelrc b/.bazelrc
index 710fcf6..a16469c 100644
--- a/.bazelrc
+++ b/.bazelrc
@@ -4,8 +4,7 @@
 
 # Build resources
 startup --batch_cpu_scheduling --io_nice_level 7
-build --jobs 12 --local_ram_resources=HOST_RAM*0.5
-test --jobs 12 --test_output=errors
+test --test_output=errors
 
 # selinux:
 #     build with SELinux (containerd, kubelet)