Remove value since their pipe is broken

.gitlab-ci.yml

 image: $CI_REGISTRY/cn-tsn/general/templates/latex
 
-lint:
-  image: golang:alpine
-  before_script:
-    - apk add --no-cache git
-    - go get github.com/errata-ai/vale
-  script:
-    - vale .
-  allow_failure: true
-
 pdf:
   script:
     - latexmk -f