Revert "Update tests.yml"

This reverts commit deefbd59fb.

.github/workflows/tests.yml

@@ -13,21 +13,13 @@ jobs:
 
     steps:
     - uses: actions/checkout@v3
-    - run:   |
-         sudo apt update
-         sudo apt install gcc-10
-      shell: bash
     - name: print versions
       run: make --version; gcc --version
     - name: run-tests
       run: make run-tests
-      env:
-        CC: gcc-10
     - name: mnist main train
       run: build/mnist-main train
             --epochs 1
             --images data/mnist/t10k-images-idx3-ubyte
             --labels data/mnist/t10k-labels-idx1-ubyte
             --out mnist-reseau.bin
-      env:
-        CC: gcc-10