Remove unneeded download of binaries

Author: mugikhan

.github/workflows/demos.yml

@@ -44,10 +44,6 @@ jobs:
         run: flutter pub global activate melos
       - name: Install dependencies
         run: melos prepare
-      - name: Set powersync core version
-        run: echo "CORE_VERSION=v0.1.8" >> $GITHUB_ENV
-      - name: Download binaries
-        run: sh tool/download_binaries.sh
       - name: Run flutter tests
         run: melos test
       - name: Run dart tests

.github/workflows/packages.yml

@@ -48,10 +48,6 @@ jobs:
         run: flutter pub global activate melos
       - name: Install dependencies and prepare project
         run: melos prepare
-      - name: Set powersync core version
-        run: echo "CORE_VERSION=v0.1.8" >> $GITHUB_ENV
-      - name: Download binaries
-        run: sh tool/download_binaries.sh
       - name: Run flutter tests
         run: melos test
       - name: Run dart tests