Rollback of PR pybind#3030 (Working around Centos 8 failure).

Author: rwgk

.github/workflows/ci.yml

@@ -592,21 +592,10 @@ jobs:
     - name: Install dependencies
       run: python3 -m pip install cmake -r tests/requirements.txt --prefer-binary
 
-    - name: VAR_BUILD_TYPE 7
-      if: matrix.centos == 7
-      run: echo MinSizeRel > VAR_BUILD_TYPE
-
-    # Using Release to avoid segfault that appeared around 2021-06-04,
-    # apparently when the gcc version changed from 8.3 to 8.4.
-    - name: VAR_BUILD_TYPE 8
-      if: matrix.centos == 8
-      run: echo Debug > VAR_BUILD_TYPE
-
     - name: Configure
       shell: bash
       run: >
         cmake -S . -B build
-        -DCMAKE_BUILD_TYPE=$(cat VAR_BUILD_TYPE)
         -DPYBIND11_WERROR=ON
         -DDOWNLOAD_CATCH=ON
         -DDOWNLOAD_EIGEN=ON