Delete code generated by the data connect cli

[dconeybe]

Delete all of the code generated by the Data Connect CLI. For now, it needs to be manually generated and copy/pasted. A follow-up PR will integrate the gradle plugin added in #6162 to run code generation on demand.

[google-oss-bot]

	1 Warning
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Generated by 🚫 Danger

[google-oss-bot]

Coverage Report ¹

Affected Products

No changes between base commit (a8f1ca2) and merge commit (5102bb7).

Test Logs

• Merge (5102bb7): https://github.com/firebase/firebase-android-sdk/actions/runs/10313073421

1. https://storage.googleapis.com/firebase-sdk-metric-reports/QVB9DAeTRG.html

[github-actions]

Unit Test Results

0 files   -   34  0 suites   - 34   0s ⏱️ -46s
0 tests  - 311  0 ✔️  - 311  0 💤 ±0  0 ❌ ±0 
0 runs   - 622  0 ✔️  - 622  0 💤 ±0  0 ❌ ±0 

Results for commit 99da135. ± Comparison against base commit d1441e4.

[google-oss-bot]

Size Report ¹

Affected Products

• base

  Type	Base (a8f1ca2)	Merge (5102bb7)	Diff
  apk (aggressive)	?	8.80 kB	? (?)
  apk (release)	?	9.77 kB	? (?)

• firebase-dataconnect

  Type	Base (a8f1ca2)	Merge (5102bb7)	Diff
  aar	?	698 kB	? (?)
  apk (aggressive)	?	279 kB	? (?)
  apk (release)	?	10.6 MB	? (?)

• protolite-well-known-types

  Type	Base (a8f1ca2)	Merge (5102bb7)	Diff
  aar	?	1.01 MB	? (?)
  apk (aggressive)	?	134 kB	? (?)
  apk (release)	?	1.68 MB	? (?)

Test Logs

• Merge (5102bb7): https://github.com/firebase/firebase-android-sdk/actions/runs/10313073421

1. https://storage.googleapis.com/firebase-sdk-metric-reports/hMaXnBTMmj.html