Move pixelmatch away from conda and mamba

Author: hansthen

.github/workflows/test_playwright.yml

@@ -26,7 +26,7 @@ jobs:
     - name: Install streamlit-folium
       shell: bash -l {0}
       run: |
-        pip install streamlit-folium pytest-playwright pytest-rerunfailures
+        pip install streamlit-folium pytest-playwright pytest-rerunfailures pixelmatch
 
     - name: Install playwright dependencies
       shell: bash -l {0}

requirements-dev.txt

@@ -25,7 +25,6 @@ nbval
 owslib
 pandas >=2
 pillow
-pixelmatch
 pre-commit
 pycodestyle
 pydata-sphinx-theme