[ci] Disable Travis CI

Signed-off-by: Michael Brown <mcb30@ipxe.org>

.travis.yml

@@ -1,58 +0,0 @@
-dist: xenial
-
-sudo: false
-
-git:
-  depth: false
-
-language: c
-
-cache: ccache
-
-compiler:
-  - gcc
-
-addons:
-  apt:
-    packages:
-      - binutils-dev
-      - liblzma-dev
-      - syslinux
-      - isolinux
-      - genisoimage
-  coverity_scan:
-    project:
-      name: "ipxe/ipxe"
-      version: $TRAVIS_COMMIT
-    build_command_prepend: "make -C src bin/deps"
-    build_command: "make -C src bin/blib.a"
-    branch_pattern: coverity_scan
-
-env:
-  global:
-    - MAKEFLAGS="-j 4"
-
-script:
-  - make -C src bin/blib.a
-  - make -C src bin/ipxe.pxe
-  - make -C src bin/ipxe.usb
-  - make -C src bin/ipxe.iso
-  - make -C src bin/8086100e.mrom
-  - make -C src bin-x86_64-pcbios/blib.a
-  - make -C src bin-x86_64-pcbios/ipxe.pxe
-  - make -C src bin-x86_64-pcbios/ipxe.usb
-  - make -C src bin-x86_64-pcbios/ipxe.iso
-  - make -C src bin-x86_64-pcbios/8086100e.mrom
-  - make -C src bin-x86_64-efi/blib.a
-  - make -C src bin-x86_64-efi/ipxe.efi
-  - make -C src bin-x86_64-efi/intel.efidrv
-  - make -C src bin-x86_64-efi/intel.efirom
-  - make -C src bin-i386-efi/blib.a
-  - make -C src bin-i386-efi/ipxe.efi
-  - make -C src bin-i386-efi/intel.efidrv
-  - make -C src bin-i386-efi/intel.efirom
-  - make -C src bin-x86_64-linux/blib.a
-  - make -C src bin-x86_64-linux/tap.linux
-  - make -C src bin-x86_64-linux/af_packet.linux
-  - make -C src bin-x86_64-linux/tests.linux
-  - ./src/bin-x86_64-linux/tests.linux