Travis: Disable job "LINUX64_MUSL USE_OPENMP=1"

https://github.com/xianyi/OpenBLAS/pull/1255#issuecomment-320494610

.travis.yml

@@ -88,12 +88,12 @@ jobs:
         - BTYPE="BINARY=64"
 
     # XXX: This job segfaults in TESTS OF THE COMPLEX LEVEL 3 BLAS,
-    # so it's "allowed to fail" for now (see allow_failures).
-    - &test-alpine-openmp
-      <<: *test-alpine
-      env:
-        - TARGET_BOX=LINUX64_MUSL
-        - BTYPE="BINARY=64 USE_OPENMP=1"
+    # but only on Travis CI, cannot reproduce it elsewhere.
+    #- &test-alpine-openmp
+    #  <<: *test-alpine
+    #  env:
+    #    - TARGET_BOX=LINUX64_MUSL
+    #    - BTYPE="BINARY=64 USE_OPENMP=1"
 
     - <<: *test-alpine
       env:
@@ -106,9 +106,6 @@ jobs:
         - TARGET_BOX=LINUX64_MUSL
         - BTYPE="BINARY=64 NO_AFFINITY=1 USE_OPENMP=0 NO_LAPACK=0 TARGET=core2"
 
-  allow_failures:
-    - <<: *test-alpine-openmp
-
 # whitelist
 branches:
   only: