disable rustfmt

Author: japaric

.travis.yml

@@ -14,8 +14,8 @@ matrix:
     - env: TARGET=thumbv7m-none-eabi
       if: (branch = staging OR branch = trying) OR (type = pull_request AND branch = master)
 
-    - env: TARGET=rustfmt
-      if: (branch = staging OR branch = trying) OR (type = pull_request AND branch = master)
+    #- env: TARGET=rustfmt
+    #  if: (branch = staging OR branch = trying) OR (type = pull_request AND branch = master)
 
 before_install: set -e