Delete Travis/AppVeyor makefile builders

We no longer need these builders as we're no longer testing the old build
system.

.travis.yml

@@ -32,7 +32,6 @@ matrix:
     - env: IMAGE=x86_64-gnu-aux
     - env: IMAGE=x86_64-gnu-debug
     - env: IMAGE=x86_64-gnu-nopt
-    - env: IMAGE=x86_64-gnu-make
     - env: IMAGE=x86_64-gnu-llvm-3.7 ALLOW_PR=1 RUST_BACKTRACE=1
     - env: IMAGE=x86_64-gnu-distcheck
     - env: IMAGE=x86_64-gnu-incremental
@@ -56,13 +55,6 @@ matrix:
       os: osx
       osx_image: xcode8.2
       install: *osx_install_sccache
-    - env: >
-        RUST_CHECK_TARGET=check
-        RUST_CONFIGURE_ARGS=--build=x86_64-apple-darwin --disable-rustbuild
-        SRC=.
-      os: osx
-      osx_image: xcode8.2
-      install: *osx_install_sccache
     - env: >
         RUST_CHECK_TARGET=dist
         RUST_CONFIGURE_ARGS="--target=aarch64-apple-ios,armv7-apple-ios,armv7s-apple-ios,i386-apple-ios,x86_64-apple-ios --enable-extended"

appveyor.yml

@@ -15,11 +15,6 @@ environment:
     SCRIPT: python x.py test --host i686-pc-windows-msvc --target i686-pc-windows-msvc && python x.py dist
     DEPLOY: 1
 
-  # MSVC makefiles
-  - MSYS_BITS: 64
-    RUST_CONFIGURE_ARGS: --build=x86_64-pc-windows-msvc --disable-rustbuild
-    RUST_CHECK_TARGET: check
-
   # MSVC cargotest
   - MSYS_BITS: 64
     NO_VENDOR: 1
@@ -58,13 +53,6 @@ environment:
     MINGW_DIR: mingw32
     DEPLOY: 1
 
-  - MSYS_BITS: 32
-    RUST_CONFIGURE_ARGS: --build=i686-pc-windows-gnu --disable-rustbuild
-    RUST_CHECK_TARGET: check
-    MINGW_URL: https://s3.amazonaws.com/rust-lang-ci
-    MINGW_ARCHIVE: i686-4.9.2-release-win32-dwarf-rt_v4-rev4.7z
-    MINGW_DIR: mingw32
-
   - MSYS_BITS: 64
     SCRIPT: python x.py test && python x.py dist
     RUST_CONFIGURE_ARGS: --build=x86_64-pc-windows-gnu --enable-extended

src/ci/docker/x86_64-gnu-make/Dockerfile

@@ -1,26 +0,0 @@
-FROM ubuntu:16.04
-
-RUN apt-get update && apt-get install -y --no-install-recommends \
-  g++ \
-  make \
-  file \
-  curl \
-  ca-certificates \
-  python2.7 \
-  git \
-  cmake \
-  sudo \
-  gdb \
-  xz-utils
-
-ENV SCCACHE_DIGEST=7237e38e029342fa27b7ac25412cb9d52554008b12389727320bd533fd7f05b6a96d55485f305caf95e5c8f5f97c3313e10012ccad3e752aba2518f3522ba783
-RUN curl -L https://api.pub.build.mozilla.org/tooltool/sha512/$SCCACHE_DIGEST | \
-      tar xJf - -C /usr/local/bin --strip-components=1
-
-RUN curl -OL https://github.com/Yelp/dumb-init/releases/download/v1.2.0/dumb-init_1.2.0_amd64.deb && \
-    dpkg -i dumb-init_*.deb && \
-    rm dumb-init_*.deb
-ENTRYPOINT ["/usr/bin/dumb-init", "--"]
-
-ENV RUST_CONFIGURE_ARGS --build=x86_64-unknown-linux-gnu --disable-rustbuild
-ENV RUST_CHECK_TARGET check