fix: babel/parcel build warnings

[erikgb]

Closes

What changed?

Tune direct dependencies to babel packages:

• Replaced @babel/preset-env with @parcel/babel-preset-env.
• Removed dependency to @babel/preset-react as it seems unused.

Why was this change made?

The current build is generating warnings, which I think might block upgrades of dependencies.

Before:

@parcel/transformer-babel: Parcel includes transpilation by default. Babel 


config babel.config.json includes the following redundant presets: 
@babel/preset-env. Removing these may improve build performance.
  /home/runner/work/weave-gitops/weave-gitops/babel.config.json:4:[13](https://github.com/weaveworks/weave-gitops/actions/runs/12616980125/job/35158760634#step:7:14)
    3 |         [
  > 4 |             "@babel/preset-env",
  >   |             ^^^^^^^^^^^^^^^^^^^
    5 |             {
    6 |                 "targets": {
  💡 Remove the above presets from babel.config.json
  📝 Learn more: https://parceljs.org/languages/javascript/#default-presets

@parcel/transformer-babel: @babel/preset-env does not support Parcel's targets, 

which will likely result in unnecessary transpilation and larger bundle sizes.
  /home/runner/work/weave-gitops/weave-gitops/babel.config.json:4:13
    3 |         [
  > 4 |             "@babel/preset-env",
  >   |             ^^^^^^^^^^^^^^^^^^^
    5 |             {
    6 |                 "targets": {

  💡 Either remove @babel/preset-env to use Parcel's builtin transpilation, 
     or replace with @parcel/babel-preset-env
  📝 Learn more: https://parceljs.org/languages/javascript/#custom-plugins

@parcel/transformer-babel: Parcel includes transpilation by default. Babel 



  💡 Remove the above presets from babel.config.json
  📝 Learn more: https://parceljs.org/languages/javascript/#default-presets



  💡 Either remove @babel/preset-env to use Parcel's builtin transpilation, 
     or replace with @parcel/babel-preset-env
  📝 Learn more: https://parceljs.org/languages/javascript/#custom-plugins

config babel.config.json includes the following redundant presets: 
@babel/preset-env. Removing these may improve build performance.
  /home/runner/work/weave-gitops/weave-gitops/babel.config.json:4:13
    3 |         [
  > 4 |             "@babel/preset-env",
  >   |             ^^^^^^^^^^^^^^^^^^^
    5 |             {
    6 |                 "targets": {
@parcel/transformer-babel: @babel/preset-env does not support Parcel's targets, 
which will likely result in unnecessary transpilation and larger bundle sizes.
  /home/runner/work/weave-gitops/weave-gitops/babel.config.json:4:13
    3 |         [
  > 4 |             "@babel/preset-env",
  >   |             ^^^^^^^^^^^^^^^^^^^
    5 |             {
    6 |                 "targets": {

After:

@parcel/transformer-babel: Parcel includes transpilation by default. Babel config babel.config.json includes the following redundant presets: @parcel/babel-preset-env. Removing these may improve build performance.

  /workspaces/weave-gitops/babel.config.json:4:13
    3 |         [
  > 4 |             "@parcel/babel-preset-env",
  >   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^
    5 |             {
    6 |                 "targets": {

  💡 Remove the above presets from babel.config.json
  📝 Learn more

Really no idea what I am doing here, so please judge this carefully.

How was this change implemented?

How did you validate the change?

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