Remove VARIANT=dev on unix port

Author: amirgon

.github/workflows/unix_port.yml

@@ -22,7 +22,7 @@ jobs:
     - name: Initialize lv_bindings submodule
       run: git submodule update --init --recursive lib/lv_bindings
     - name: Update Unix port submodules
-      run: make -C ports/unix VARIANT=dev DEBUG=1 submodules
+      run: make -C ports/unix DEBUG=1 submodules
     - name: Checkout lv_bindings
       working-directory: ./lib/lv_bindings
       run: |
@@ -33,7 +33,7 @@ jobs:
     - name: Build mpy-cross
       run: make -j $(nproc) -C mpy-cross
     - name: Build the unix port
-      run: make -j $(nproc) -C ports/unix VARIANT=dev DEBUG=1
+      run: make -j $(nproc) -C ports/unix DEBUG=1
     - name: Run tests      
       run: |
         export XDG_RUNTIME_DIR=/tmp