travis: don't clone git submodules upfront

The configure script & Makefile are already capable of figuring out
which git submodules are required for a given build platform, and
cloning them at the right time.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>

.travis.yml

@@ -71,7 +71,6 @@ git:
 before_install:
   - if [ "$TRAVIS_OS_NAME" == "osx" ]; then brew update ; fi
   - if [ "$TRAVIS_OS_NAME" == "osx" ]; then brew install libffi gettext glib pixman ; fi
-  - git submodule update --init --recursive capstone dtc ui/keycodemapdb
 before_script:
   - mkdir -p ${BUILD_DIR} && cd ${BUILD_DIR}
   - ${SRC_DIR}/configure ${CONFIG} || { cat config.log && exit 1; }