Remove the full-bootstrap builder from CI

.github/workflows/ci.yml

@@ -364,9 +364,6 @@ jobs:
           - name: x86_64-gnu-distcheck
             os: ubuntu-latest-xl
             env: {}
-          - name: x86_64-gnu-full-bootstrap
-            os: ubuntu-latest-xl
-            env: {}
           - name: x86_64-gnu-llvm-8
             env:
               RUST_BACKTRACE: 1

src/ci/docker/host-x86_64/x86_64-gnu-full-bootstrap/Dockerfile

@@ -1,30 +0,0 @@
-FROM ubuntu:16.04
-
-RUN apt-get update && apt-get install -y --no-install-recommends \
-  g++ \
-  make \
-  file \
-  curl \
-  ca-certificates \
-  python3 \
-  git \
-  cmake \
-  sudo \
-  gdb \
-  libssl-dev \
-  pkg-config \
-  xz-utils
-
-COPY scripts/sccache.sh /scripts/
-RUN sh /scripts/sccache.sh
-
-ENV RUST_CONFIGURE_ARGS \
-      --build=x86_64-unknown-linux-gnu \
-      --enable-full-bootstrap
-ENV SCRIPT python3 ../x.py --stage 2 build
-
-# In general this just slows down the build and we're just a smoke test that
-# a full bootstrap works in general, so there's not much need to take this
-# penalty in build times.
-ENV NO_LLVM_ASSERTIONS 1
-ENV NO_DEBUG_ASSERTIONS 1

src/ci/github-actions/ci.yml

@@ -419,9 +419,6 @@ jobs:
           - name: x86_64-gnu-distcheck
             <<: *job-linux-xl
 
-          - name: x86_64-gnu-full-bootstrap
-            <<: *job-linux-xl
-
           - name: x86_64-gnu-llvm-8
             env:
               RUST_BACKTRACE: 1