travis: remove display of test-suite.log from macOS

We are not running "make check" on macOS, so the commands to cat the
test-suite.log are not useful.
Reviewed-by: NAndrea Bolognani <abologna@redhat.com>
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>

.travis.yml

@@ -63,13 +63,7 @@ env:
         ./autogen.sh --prefix=\$(pwd)/install-root &&
         make -j3 &&
         make -j3 install &&
-        make -j3 dist ||
-        (
-          echo '=== LOG FILE(S) START ===';
-          find -name test-suite.log | xargs cat;
-          echo '=== LOG FILE(S) END ===';
-          exit 1
-        )
+        make -j3 dist
       "
 
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