Fix the GitHub workflows

Author: arithy

.github/workflows/release.yml

@@ -31,14 +31,11 @@ jobs:
 
       - name: Build release version
         run: |
-          if [[ "${{ matrix.os }}"x =~ '^ubuntu' ]]; then
-            export CC=gcc
-          fi
           mkdir packcc-${{ github.ref_name }} &&
           (
           mkdir build-release &&
           cd build-release &&
-          cmake -DCMAKE_C_COMPILER=$CC -DCMAKE_BUILD_TYPE=Release .. &&
+          cmake -DCMAKE_BUILD_TYPE=Release .. &&
           cmake --build . --config Release &&
           cmake --install . --config Release --prefix $PWD/../packcc-${{ github.ref_name }}
           ) &&

.github/workflows/test.yml

@@ -203,7 +203,7 @@ jobs:
           (
           mkdir build-debug &&
           cd build-debug &&
-          cmake -DCMAKE_C_COMPILER=$CC -DCMAKE_BUILD_TYPE=Debug .. &&
+          cmake -DCMAKE_BUILD_TYPE=Debug .. &&
           cmake --build . --config Debug --target check
           )
 
@@ -212,6 +212,6 @@ jobs:
           (
           mkdir build-release &&
           cd build-release &&
-          cmake -DCMAKE_C_COMPILER=$CC -DCMAKE_BUILD_TYPE=Release .. &&
+          cmake -DCMAKE_BUILD_TYPE=Release .. &&
           cmake --build . --config Release --target check
           )