CI script: R should be in c:/R/bin/x64 only

Change-Id: Ic9473fe7e6ee9bc254bd1e1c4e6fcd7b54e932ef
diff --git a/.github/workflows/pythonpackage.yml b/.github/workflows/pythonpackage.yml
index cb95190..cfec24f 100644
--- a/.github/workflows/pythonpackage.yml
+++ b/.github/workflows/pythonpackage.yml
@@ -86,7 +86,7 @@
       env:
         R_HOME: "c:/R"
         R_USER: "c:/R"
-        PATH: "${{ env.PATH }};C:/R/bin/x64;c:/R/bin/i386;c:/R;c:/R/bin"
+        PATH: "c:/R/bin/x64;${{ env.PATH }}"
     - name: Upload check results
       if: failure()
       uses: actions/upload-artifact@master