delete all .la files

Refs https://github.com/teaxyz/pantry.extra/pull/74#issuecomment-1359708974

.github/workflows/build.yml

@@ -210,6 +210,9 @@ jobs:
       - run: tar xzf artifacts.tgz
         working-directory: ${{ steps.tea.outputs.prefix }}
 
+      - name: delete `.la` files
+        run: find ${{ steps.tea.outputs.prefix }} -name '*.la' -delete
+
       # the next three steps bless our code for Apple. It might be the case they should be
       # encapulated separately.
       # FIXME: using an explicit commit in a PR isn't great, but the last release was almost 3 years