remove formatter from gh actions

.github/workflows/format.yml

-name: format-check
-
-on:
-  push:
-    branches:
-      - 'master'
-    tags: '*'
-  pull_request:
-
-jobs:
-  build:
-    runs-on: ${{ matrix.os }}
-    strategy:
-      matrix:
-        julia-version: [1.3.0]
-        julia-arch: [x86]
-        os: [ubuntu-latest]
-    steps:
-      - uses: julia-actions/setup-julia@latest
-        with:
-          version: ${{ matrix.julia-version }}
-
-      - uses: actions/checkout@v1
-      - name: Install JuliaFormatter and format
-        run: |
-          julia  -e 'using Pkg; Pkg.add(PackageSpec(name="JuliaFormatter"))'
-          julia  -e 'using JuliaFormatter; format(".", verbose=true)'
-      - name: Format check
-        run: |
-          julia -e '
-          out = Cmd(`git diff --name-only`) |> read |> String
-          if out == ""
-              exit(0)
-          else
-              @error "Some files have not been formatted !!!"
-              write(stdout, out)
-              exit(1)
-          end'
\ No newline at end of file