Remove shell from windows builds

Author: diegorusso

.github/workflows/reusable-windows-msi.yml

@@ -32,4 +32,3 @@ jobs:
         persist-credentials: false
     - name: Build CPython installer
       run: ./Tools/msi/build.bat --doc -"${ARCH}"
-      shell: bash

.github/workflows/reusable-windows.yml

@@ -42,7 +42,6 @@ jobs:
         -e -d -v
         -p "${ARCH}"
         ${{ fromJSON(inputs.free-threading) && '--disable-gil' || '' }}
-      shell: bash
     - name: Display build info
       run: .\\python.bat -m test.pythoninfo
     - name: Tests
@@ -51,4 +50,3 @@ jobs:
         -p "${ARCH}"
         -d -q --fast-ci
         ${{ fromJSON(inputs.free-threading) && '--disable-gil' || '' }}
-      shell: bash