Remove opam-depext-flags from ocaml/setup-ocaml@v3

It has been removed now and didn't work anyway.

Author: sim642

.github/workflows/coverage.yml

@@ -38,7 +38,6 @@ jobs:
         uses: ocaml/setup-ocaml@v3
         with:
           ocaml-compiler: ${{ matrix.ocaml-compiler }}
-          opam-depext-flags: --with-test # doesn't work (https://github.com/ocaml/opam/issues/5836)
 
       - name: Install graph-easy # TODO: remove if depext --with-test works
         if: ${{ matrix.os == 'ubuntu-latest' }}

.github/workflows/locked.yml

@@ -40,7 +40,6 @@ jobs:
         uses: ocaml/setup-ocaml@v3
         with:
           ocaml-compiler: ${{ matrix.ocaml-compiler }}
-          opam-depext-flags: --with-test # doesn't work (https://github.com/ocaml/opam/issues/5836)
 
       - name: Install graph-easy # TODO: remove if depext --with-test works
         if: ${{ matrix.os == 'ubuntu-latest' }}
@@ -90,7 +89,6 @@ jobs:
         uses: ocaml/setup-ocaml@v3
         with:
           ocaml-compiler: ${{ matrix.ocaml-compiler }}
-          opam-depext-flags: --with-test # doesn't work (https://github.com/ocaml/opam/issues/5836)
 
       - name: Install graph-easy # TODO: remove if depext --with-test works
         if: ${{ matrix.os == 'ubuntu-latest' }}

.github/workflows/unlocked.yml

@@ -48,7 +48,6 @@ jobs:
         uses: ocaml/setup-ocaml@v3
         with:
           ocaml-compiler: ${{ matrix.ocaml-compiler }}
-          opam-depext-flags: --with-test # doesn't work (https://github.com/ocaml/opam/issues/5836)
 
       - name: Install graph-easy # TODO: remove if depext --with-test works
         if: ${{ matrix.os == 'ubuntu-latest' }}
@@ -109,7 +108,6 @@ jobs:
         uses: ocaml/setup-ocaml@v3
         with:
           ocaml-compiler: ${{ matrix.ocaml-compiler }}
-          opam-depext-flags: --with-test # doesn't work (https://github.com/ocaml/opam/issues/5836)
 
       - name: Install graph-easy # TODO: remove if depext --with-test works
         if: ${{ matrix.os == 'ubuntu-latest' }}
@@ -202,7 +200,6 @@ jobs:
         uses: ocaml/setup-ocaml@v3
         with:
           ocaml-compiler: ${{ matrix.ocaml-compiler }}
-          opam-depext-flags: --with-test # doesn't work (https://github.com/ocaml/opam/issues/5836)
 
       - name: Install graph-easy # TODO: remove if depext --with-test works
         if: ${{ matrix.os == 'ubuntu-latest' }}