Bug 1013060 - Stop setting SCCACHE_NO_HTTPS. r=mshal

build/mozconfig.cache

@@ -25,7 +25,6 @@ if test -z "$SCCACHE_DISABLE" -a -z "$no_sccache"; then
                 bucket=mozilla-releng-s3-cache-us-west-2-try
                 ;;
             esac
-            mk_add_options "export SCCACHE_NO_HTTPS=1"
             ;;
         *use1.mozilla.com*)
             bucket=mozilla-releng-s3-cache-us-east-1-try