update android ci script

.github/workflows/pr_test_build_android.yml

@@ -267,17 +267,7 @@ jobs:
           cp app-x86_64-release.apk test-apk/${BRANCH_NAME}_x86.apk
           cd test-apk
           cp ${BRANCH_NAME}.apk ${BRANCH_NAME}_slack.apk
-      - name: Upload Artifact
-        uses: kittaakos/upload-artifact-as-is@v0
-        with:
-          path: ${{ github.workspace }}/build/app/outputs/flutter-apk/test-apk/
 
-      # Re-upload updated build number for the next run
-      - name: Upload updated build number
-        uses: actions/upload-artifact@v3
-        with:
-          name: build_number
-          path: build_number.txt
       - name: Find APK file
         id: find_apk
         run: |
@@ -293,4 +283,10 @@ jobs:
           path: ${{ env.APK_FILE }}
           channel: ${{ secrets.SLACK_APK_CHANNEL }}
           initial_comment: ${{ github.event.head_commit.message }}
-
+      - name: cleanup
+        run: rm -rf build/app/outputs/flutter-apk/test-apk/
+
+      - name: Upload Artifact
+        uses: kittaakos/upload-artifact-as-is@v0
+        with:
+          path: ${{ github.workspace }}/build/app/outputs/flutter-apk