Stop using Mambaforge

Author: chrisburr

.github/workflows/build-and-test.yml

@@ -40,7 +40,6 @@ jobs:
         uses: conda-incubator/setup-miniconda@v2
         with:
           environment-file: scripts/environment.yml
-          miniforge-variant: Mambaforge
           use-mamba: true
       - name: Create installer
         run: |
@@ -102,7 +101,6 @@ jobs:
         uses: conda-incubator/setup-miniconda@v2
         with:
           environment-file: scripts/environment.yml
-          miniforge-variant: Mambaforge
           use-mamba: true
       - name: Create release notes
         run: |

.github/workflows/release.yaml

@@ -25,7 +25,6 @@ jobs:
         uses: conda-incubator/setup-miniconda@v2
         with:
           environment-file: scripts/environment.yml
-          miniforge-variant: Mambaforge
           use-mamba: true
       - name: Create release
         run: |