cores: arduino: Remove unused symlink

With the introduction of blobs, the `cores/arduino/api` symlink is
no longer necessary, so delete it.

Signed-off-by: TOKITA Hiroshi <tokita.hiroshi@gmail.com>

Author: soburi

.github/workflows/build.yml

@@ -50,14 +50,14 @@ jobs:
           west-project-filter: ${{ env.HAL_FILTER }}
           enable-ccache: false
 
-      - name: Fetch blobs
-        run: |
-          west blobs --auto-accept fetch arduinocore-zephyr
-
       - name: Add manifest path as module
         run: |
           echo EXTRA_ZEPHYR_MODULES="$(pwd)/$MODULE_PATH" >> $GITHUB_ENV
 
+      - name: Fetch blobs
+        run: |
+          west blobs --auto-accept fetch arduinocore-zephyr
+
       - name: Build fade
         run: |
           west build -p -b arduino_nano_33_ble//sense $MODULE_PATH/samples/fade

.github/workflows/package_core.yml

@@ -249,7 +249,6 @@ jobs:
       - name: Package core
         run: |
           # Extract the API snapshot and board binaries in place
-          rm -f cores/arduino/api # remove broken symlink
           tar --use-compress-program=unzstd -xpf arduino-api.tar.zstd
           for f in binaries-*.tar.zstd ; do
             tar --use-compress-program=unzstd -xpf $f