fixci: don't prompt an error if the sqlite file doesn't exist

Author: did

.github/workflows/verify.yml

@@ -89,8 +89,8 @@ jobs:
         run: |
           cp spec/dummy/db/schema.pg.rb spec/dummy/db/schema.rb
           cp spec/legacy_dummy/db/schema.pg.rb spec/legacy_dummy/db/schema.rb
-          rm spec/dummy/db/maglev_engine_test.sqlite3
-          rm spec/legacy_dummy/db/maglev_engine_test.sqlite3
+          rm -f spec/dummy/db/maglev_engine_test.sqlite3
+          rm -f spec/legacy_dummy/db/maglev_engine_test.sqlite3
 
       - name: Run Javascript tests
         run: yarn test