Remove travis config

We disabled travis a while ago and the config file is
only a leftover now. Remove it.

Change-Id: If00437cd584dc8f3807f20731647a876b9278992
Signed-off-by: Darek Stojaczyk <dariusz.stojaczyk@intel.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/463452
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>

.travis.yml

@@ -1,27 +0,0 @@
-language: c
-
-compiler:
-  - gcc
-  - clang
-
-dist: trusty
-sudo: false
-
-addons:
-  apt:
-    packages:
-      - libcunit1-dev
-      - libaio-dev
-      - libssl-dev
-      - uuid-dev
-      - libnuma-dev
-
-before_script:
-  - git submodule update --init
-  - export MAKEFLAGS="-j$(nproc)"
-
-script:
-  - ./scripts/check_format.sh
-  - ./configure --enable-werror
-  - make
-  - ./test/unit/unittest.sh