Remove test building from automerge script

Author: Foereaper

.github/workflows/auto-merge.yml

@@ -53,8 +53,7 @@ jobs:
           -DCMAKE_CXX_FLAGS="-Werror" \
           -DCMAKE_C_FLAGS_DEBUG="-DNDEBUG" \
           -DCMAKE_CXX_FLAGS_DEBUG="-DNDEBUG" \
-          -DCMAKE_INSTALL_PREFIX=check_install \
-          -DBUILD_TESTING="ON"
+          -DCMAKE_INSTALL_PREFIX=check_install
 
     - name: Build
       run: |