Remove tmate and use explicit shell

Author: matt-graham

.github/workflows/tests.yml

@@ -49,6 +49,7 @@ jobs:
 
     - if: matrix.os == 'macos-latest'
       name: Install dependencies with conda on MacOS
+      shell: bash -el {0}
       # Avoid OpenMP runtime incompatibility when using PyPI wheels
       # by installing torch and healpy using conda
       # https://github.com/healpy/healpy/issues/1012
@@ -58,12 +59,6 @@ jobs:
         pip install --no-deps so3 pyssht
         pip install --no-deps .
   
-    - if: matrix.os == 'macos-latest'
-      name: Setup tmate session
-      uses: mxschmitt/action-tmate@v3
-      with:
-        limit-access-to-actor: true
-  
     - if: matrix.os != 'macos-latest'
       name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v5