Delete Travis/AppVeyor makefile builders

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

Author: alexcrichton

.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