3ds/switch CI: Remove cmake install command

The command no longer works because debian-backports got discontinued
today but luckily CMake is already installed from backports in the base
image:
375f414082/toolchain-base/Dockerfile (L16-L18)

.github/workflows/3ds.yml

@@ -33,12 +33,7 @@ jobs:
 
       - name: Install dependencies
         run: |
-          tee /etc/apt/sources.list.d/bullseye-backports.list <<LIST
-          deb http://deb.debian.org/debian bullseye-backports main
-          LIST
-          apt-get update
-          apt-get install -y -t bullseye-backports cmake
-          apt-get install -y \
+          apt-get install -t bullseye -y --no-install-recommends --no-install-suggests \
             ffmpeg \
             gettext
 

.github/workflows/switch.yml

@@ -33,11 +33,6 @@ jobs:
 
       - name: Install dependencies
         run: |
-          tee /etc/apt/sources.list.d/bullseye-backports.list <<LIST
-          deb http://deb.debian.org/debian bullseye-backports main
-          LIST
-          apt-get update
-          apt-get install -y -t bullseye-backports cmake
           apt-get install -y --no-install-recommends --no-install-suggests \
             gettext