remove unused matrix attributes

Author: FynnBe

.github/workflows/build.yaml

@@ -58,31 +58,19 @@ jobs:
       matrix:
         include:
           - python-version: '3.9'
-            conda-env: dev
-            spec: conda
             numpy-version: 1
           - python-version: '3.9'
-            conda-env: dev
-            spec: main
             numpy-version: 2
           - python-version: '3.10'
-            conda-env: full
             run-expensive-tests: true
             report-coverage: true
             save-cache: true
-            spec: conda
             numpy-version: 1
           - python-version: '3.11'
-            conda-env: dev
-            spec: main
             numpy-version: 2
           - python-version: '3.12'
-            conda-env: dev
-            spec: conda
             numpy-version: 1
           # - python-version: '3.13'
-          #   conda-env: '313'
-          #   spec: main
           #   numpy-version: 2
 
     steps: