Disable Windows on Travis

The MinGW builds already don't work and the MSVC ones are now timing out
and have been slow otherise, so they're being removed to reduce spurious
failures on Travis.

Author: alexcrichton

.travis.yml

@@ -68,25 +68,6 @@ matrix:
     - name: "thumbv7em-none-eabihf - build libcore only"
       env: TARGET=thumbv7em-none-eabihf NORUN=1 NOSTD=1
       script: ci/run.sh
-    - name: "x86_64-pc-windows-msvc"
-      env: TARGET=x86_64-pc-windows-msvc
-      os: windows
-      script: ci/run.sh
-      install: true
-    - name: "x86_64-pc-windows-gnu - no assert_instr"
-      # FIXME: https://github.com/rust-lang-nursery/stdsimd/issues/595
-      env: TARGET=x86_64-pc-windows-gnu STDSIMD_DISABLE_ASSERT_INSTR=1
-      os: windows
-      script: ci/run.sh
-    - name: "i686-pc-windows-msvc - no assert_instr"
-      # FIXME: https://github.com/rust-lang-nursery/stdsimd/issues/595
-      env: TARGET=i686-pc-windows-msvc STDSIMD_DISABLE_ASSERT_INSTR=1
-      os: windows
-      script: ci/run.sh
-    - name: "i686-pc-windows-gnu"
-      env: TARGET=i686-pc-windows-gnu
-      os: windows
-      script: ci/run.sh
     - name: "Documentation"
       install: true
       script: ci/dox.sh
@@ -109,9 +90,6 @@ matrix:
         - shellcheck --version
         - shellcheck ci/*.sh
   allow_failures:
-    # FIXME: https://github.com/rust-lang/rust/issues/56153
-    - env: TARGET=x86_64-pc-windows-gnu STDSIMD_DISABLE_ASSERT_INSTR=1
-    - env: TARGET=i686-pc-windows-gnu
     # FIXME https://github.com/rust-lang/libc/issues/1170
     - name: "x86_64-linux-android - no assert_instr"
     - name: "arm-linux-androideabi - no assert_instr"