[PATCH for 4.2?] .travis.yml: drop xcode9.4 from build matrix

[Alex Bennée]

It's broken so it's no longer helping. The latest Xcode is covered by
Cirrus.

Signed-off-by: Alex Bennée <alex.ben...@linaro.org>
---
 .travis.yml | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index c09b6a00143..445b0646c18 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -237,13 +237,7 @@ matrix:
         - TEST_CMD=""
 
 
-    # MacOSX builds
-    - env:
-        - CONFIG="--target-list=${MAIN_SOFTMMU_TARGETS}"
-      os: osx
-      osx_image: xcode9.4
-      compiler: clang
-
+    # MacOSX builds - cirrus.yml also tests some MacOS builds including latest 
Xcode
 
     - env:
         - 
CONFIG="--target-list=i386-softmmu,ppc-softmmu,ppc64-softmmu,m68k-softmmu,x86_64-softmmu"
-- 
2.20.1