Disable FreeBSD Runner in the CI; it's broken again.

.gitlab-ci.yml

@@ -94,14 +94,6 @@ stages:
   image: "$CI_REGISTRY_IMAGE:ubuntu-bionic-i386"
   <<: *linux_i386
 
-# FreeBSD
-
-.freebsd-12-amd64: &freebsd_12_amd64_image
-  tags:
-    - freebsd12
-    - amd64
-  allow_failure: true
-
 ### Job Templates
 
 .default-triggering-rules: &default_triggering_rules
@@ -468,24 +460,6 @@ unit:gcc:bionic:amd64:
   dependencies:
     - gcc:bionic:amd64
 
-# Jobs for default CC builds on FreeBSD 12 (amd64)
-
-clang:freebsd12:amd64:
-  <<: *freebsd_12_amd64_image
-  <<: *build_job
-
-system:clang:freebsd12:amd64:
-  <<: *freebsd_12_amd64_image
-  <<: *system_test_job
-  dependencies:
-    - clang:freebsd12:amd64
-
-unit:clang:freebsd12:amd64:
-  <<: *freebsd_12_amd64_image
-  <<: *unit_test_job
-  dependencies:
-    - clang:freebsd12:amd64
-
 # Jobs for GCC builds with ASAN enabled on Debian Sid (amd64)
 
 asan:sid:amd64: