Remove micromamba pin in CI (#50)

Author: ianthomas23

.github/workflows/build.yml

@@ -110,8 +110,6 @@ jobs:
 
     - name: Micromamba needed for cockle_wasm_env
       uses: mamba-org/setup-micromamba@main
-      with:
-        micromamba-version: '2.0.5-0'
 
     - name: Install dependencies
       working-directory: ui-tests

.github/workflows/deploy.yml

@@ -29,8 +29,6 @@ jobs:
 
       - name: Micromamba needed for cockle_wasm_env
         uses: mamba-org/setup-micromamba@main
-        with:
-          micromamba-version: '2.0.5-0'
 
       - name: Build the JupyterLite site
         working-directory: deploy

.github/workflows/update-integration-tests.yml

@@ -44,8 +44,6 @@ jobs:
 
       - name: Micromamba needed for cockle_wasm_env
         uses: mamba-org/setup-micromamba@main
-        with:
-          micromamba-version: '2.0.5-0'
 
       - name: Install dependencies
         working-directory: ui-tests