chpre: remove generate spm script

Author: russellwheatley

pubspec.yaml

@@ -97,8 +97,6 @@ melos:
           dart run scripts/generate_versions_web.dart && \
           dart run scripts/generate_versions_spm.dart && \
           git add packages/firebase_data_connect/firebase_data_connect/lib/src/dataconnect_version.dart && git add packages/*/*_web/lib/src/*_version.dart && git add packages/*/*/ios/*/Package.swift packages/*/*/macos/*/Package.swift && git add packages/*/*/ios/*/Sources/*/Constants.swift
-        post: |
-          dart run scripts/generate_tag_spm_firebase_core.dart
 
     bootstrap:
       # It seems so that running "pub get" in parallel has some issues (like