remove extra elastix build

Author: Artur-man

.github/workflows/main.yml

@@ -78,6 +78,5 @@ jobs:
       env:
         ITK_GLOBAL_DEFAULT_NUMBER_OF_THREADS: 2
       run: |
-        $env:MAKEJ="8"
-        $env:ADDITIONAL_SITK_MODULES="-DSimpleITK_USE_ELASTIX=ON"
+        $env:MAKEJ="4"
         Rcmd.exe INSTALL --build .