chore: Revert canvas recording option

[benjackwhite]

Changes

We added the option for recording canvas but we can't support it yet - see this issue for more context

Checklist

• Tests for new code (see advice on the tests we use)
• Accounted for the impact of any changes across different browsers

[posthog-bot]

Hey @benjackwhite! 👋
This pull request seems to contain no description. Please add useful context, rationale, and/or any other information that will help make sense of this change now and in the distant Mars-based future.

[github-actions]

Size Change: -64 B (0%)

Total Size: 2.28 MB

Filename	Size	Change
dist/array.full.js	152 kB	-16 B (0%)
dist/array.js	93.6 kB	-16 B (0%)
dist/es.js	93.4 kB	-16 B (0%)
dist/module.js	93.6 kB	-16 B (0%)

ℹ️ View Unchanged

Filename	Size
dist/recorder-v2.js	92.5 kB
dist/recorder.js	58.3 kB
lib/rrweb/dist/plugins/console-record.js	26.6 kB
lib/rrweb/dist/plugins/console-record.min.js	10.8 kB
lib/rrweb/dist/plugins/console-replay.js	12.7 kB
lib/rrweb/dist/plugins/console-replay.min.js	5.72 kB
lib/rrweb/dist/plugins/sequential-id-record.js	910 B
lib/rrweb/dist/plugins/sequential-id-record.min.js	417 B
lib/rrweb/dist/plugins/sequential-id-replay.js	1.24 kB
lib/rrweb/dist/plugins/sequential-id-replay.min.js	578 B
lib/rrweb/dist/record/rrweb-record-pack.js	31.4 kB
lib/rrweb/dist/record/rrweb-record-pack.min.js	10.7 kB
lib/rrweb/dist/record/rrweb-record.js	140 kB
lib/rrweb/dist/record/rrweb-record.min.js	51.7 kB
lib/rrweb/dist/replay/rrweb-replay-unpack.js	188 kB
lib/rrweb/dist/replay/rrweb-replay-unpack.min.js	71.1 kB
lib/rrweb/dist/replay/rrweb-replay.js	172 kB
lib/rrweb/dist/replay/rrweb-replay.min.js	66.4 kB
lib/rrweb/dist/rrweb-all.js	356 kB
lib/rrweb/dist/rrweb-all.min.js	133 kB
lib/rrweb/dist/rrweb.js	302 kB
lib/rrweb/dist/rrweb.min.js	116 kB
lib/rrweb/es/rrweb/ext/base64-arraybuffer/dist/base64-arraybuffer.es5.js	1.94 kB
lib/rrweb/es/rrweb/ext/mitt/dist/mitt.es.js	1.99 kB

_{compressed-size-action}

[tjhiggins]

You should also update the docs:
https://posthog.com/docs/session-recording/configure