chore: remove legacy treemap/area

[zhaoyongjie]

SUMMARY

Remove unused viz-plugins

1. Legacy TreeMap
2. NVD3 Area

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

N/A

TESTING INSTRUCTIONS

CI

ADDITIONAL INFORMATION

• Has associated issue:
• Required feature flags:
• Changes UI
• Includes DB Migration (follow approval process in SIP-59)
  • Migration is atomic, supports rollback & is backwards-compatible
  • Confirm DB migration upgrade and downgrade tested
  • Runtime estimates and downtime expectations provided
• Introduces new feature or API
• Removes existing feature or API

[john-bodley]

@zhaoyongjie are we 100% sure these are unused? If not it seems like a migration would be necessary conditional on the fact that parity exists between the old NVD3 and new ECharts charts.

[zhaoyongjie]

@john-bodley thanks for the tip, I updated PR, and the legacy plugins were been kept. when the PR is merged, I will turn this open.

[codecov]

Codecov Report

Merging #20639 (b6d2f08) into master (4e6e87f) will increase coverage by 0.00%.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master   #20639   +/-   ##
=======================================
  Coverage   66.79%   66.79%           
=======================================
  Files        1754     1754           
  Lines       65874    65862   -12     
  Branches     7030     7030           
=======================================
- Hits        43999    43994    -5     
+ Misses      20086    20079    -7     
  Partials     1789     1789           

Flag	Coverage Δ
hive	53.87% <ø> (-0.01%)	⬇️
mysql	?
postgres	82.55% <ø> (+0.10%)	⬆️
presto	53.73% <ø> (-0.01%)	⬇️
python	82.90% <ø> (+0.02%)	⬆️
sqlite	?
unit	50.96% <ø> (+0.13%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...-frontend/src/visualizations/presets/MainPreset.js	100.00% <ø> (ø)
superset/examples/birth_names.py	71.55% <ø> (ø)
superset/examples/world_bank.py	31.57% <ø> (ø)
...ns/legacy-plugin-chart-treemap/src/controlPanel.ts	0.00% <0.00%> (-100.00%)	⬇️
...d/plugins/legacy-plugin-chart-treemap/src/index.js	0.00% <0.00%> (-66.67%)	⬇️
...plugins/legacy-preset-chart-nvd3/src/Area/index.js	33.33% <0.00%> (-33.34%)	⬇️
superset/db_engine_specs/sqlite.py	91.89% <0.00%> (-5.41%)	⬇️
superset/common/utils/dataframe_utils.py	90.47% <0.00%> (-4.77%)	⬇️
superset/db_engine_specs/mysql.py	93.97% <0.00%> (-3.62%)	⬇️
superset/utils/celery.py	86.20% <0.00%> (-3.45%)	⬇️
... and 13 more

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