ci: travis: remove \ as they dont pass yaml parsing

Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>

Author: lrgirdwo

.travis.yml

@@ -9,6 +9,4 @@ before_install:
   - docker build --build-arg UID=$(id -u) -t sof .
 
 script:
-  - docker run -it -v `pwd`:/home/sof/work/sof.git \
-           -v `pwd`/../soft.git:/home/sof/work/soft.git \
-	   --user `id -u` sof ./scripts/xtensa-build-all.sh -l
+  - docker run -it -v `pwd`:/home/sof/work/sof.git -v `pwd`/../soft.git:/home/sof/work/soft.git --user `id -u` sof ./scripts/xtensa-build-all.sh -l