Drop building of conda packages for win-x86 platform.

Either miniconda is not available or setuptools/setuptools-scm not
available from default channels at high enough version for our builds.

This platform should get deprecated away soon-ish.
If you are reading this and need win-x86 packages,
use pip packages for now and contact the devs for options to move off
this platform.

.github/workflows/release.yml

@@ -62,9 +62,9 @@ jobs:
 
           - { os: windows-latest,  python: '3.12',  arch: x86, conda: false } # conda not yet available
           - { os: windows-latest,  python: '3.11',  arch: x86, conda: false } # conda not yet available
-          - { os: windows-latest,  python: '3.10',  arch: x86, conda: true }
-          - { os: windows-latest,  python: '3.9',  arch: x86, conda: true }
-          - { os: windows-latest,  python: '3.8',  arch: x86, conda: true }
+          - { os: windows-latest,  python: '3.10',  arch: x86, conda: false } # setuptools/setuptools-scm deps not met
+          - { os: windows-latest,  python: '3.9',  arch: x86, conda: false } # setuptools/setuptools-scm deps not met
+          - { os: windows-latest,  python: '3.8',  arch: x86, conda: false } # setuptools/setuptools-scm deps not met
 
     if: github.repository == 'labscript-suite/labscript-c-extensions' && (github.event_name != 'create' || github.event.ref_type != 'branch')
     steps: