Remove CONSTRAINTS_SSH_KEY from Github Actions

This removes the need for the `CONSTRAINTS_SSH_KEY` from the Github
actions.  This is no longer required since all relevant repositories are
now public.

.github/actions/setup-rust-corset/action.yml

@@ -9,4 +9,4 @@ runs:
 
     - name: Install Corset
       shell: bash
-      run: RUSTFLAGS=-Awarnings cargo install --git ssh://git@github.com/ConsenSys/corset --tag v9.7.17 --locked --force
+      run: RUSTFLAGS=-Awarnings cargo install --git https://github.com/Consensys/corset.git --tag v9.7.17 --locked --force

.github/workflows/gradle.yml

@@ -58,11 +58,6 @@ jobs:
         if: ${{ inputs.tests-with-ssh }}
         uses: lhotari/action-upterm@v1
 
-      - uses: webfactory/ssh-agent@v0.7.0
-        with:
-          ssh-private-key: |
-            ${{ secrets.CONSTRAINTS_SSH_KEY }}
-
       - name: Checkout repository
         uses: actions/checkout@v3
         with:
@@ -109,11 +104,6 @@ jobs:
         if: ${{ inputs.tests-with-ssh }}
         uses: lhotari/action-upterm@v1
 
-      - uses: webfactory/ssh-agent@v0.7.0
-        with:
-          ssh-private-key: |
-            ${{ secrets.CONSTRAINTS_SSH_KEY }}
-
       - name: Checkout repository
         uses: actions/checkout@v3
         with: