Remove TransactionRunner when not used

[schmidt-sebastian]

This PR removes the hard dependency on Transaction/TransactionRunner from code that doesn't use it (for firestore-exp).

[changeset-bot]

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Latest commit: 7c383e9

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[google-oss-bot]

Binary Size Report

Affected SDKs

• @firebase/firestore

  Type	Base (0966416)	Head (dfd15ca)	Diff
  browser	247 kB	247 kB	-111 B (-0.0%)
  esm2017	193 kB	193 kB	-67 B (-0.0%)
  main	472 kB	472 kB	-195 B (-0.0%)
  module	244 kB	244 kB	-111 B (-0.0%)
  react-native	193 kB	193 kB	-67 B (-0.0%)

• @firebase/firestore/exp

  Type	Base (0966416)	Head (dfd15ca)	Diff
  browser	187 kB	187 kB	-78 B (-0.0%)
  main	465 kB	464 kB	-256 B (-0.1%)
  module	187 kB	187 kB	-78 B (-0.0%)
  react-native	187 kB	187 kB	-78 B (-0.0%)

• @firebase/firestore/memory

  Type	Base (0966416)	Head (dfd15ca)	Diff
  browser	186 kB	185 kB	-111 B (-0.1%)
  esm2017	145 kB	145 kB	-67 B (-0.0%)
  main	347 kB	347 kB	-195 B (-0.1%)
  module	184 kB	183 kB	-111 B (-0.1%)
  react-native	145 kB	145 kB	-67 B (-0.0%)

• firebase

  Type	Base (0966416)	Head (dfd15ca)	Diff
  firebase-firestore.js	286 kB	286 kB	-113 B (-0.0%)
  firebase-firestore.memory.js	226 kB	226 kB	-113 B (-0.0%)
  firebase.js	819 kB	819 kB	-113 B (-0.0%)

Test Logs

• Base (09664164): https://github.com/firebase/firebase-js-sdk/actions/runs/193565957
• Head (dfd15ca2): https://github.com/firebase/firebase-js-sdk/actions/runs/193570660

[thebrianchen]

lgtm, good eye in spotting this 🕵️