Remove SDK option `defaultReadOnlyChainId` #418

Job	Run time
Build	5m 6s
Lint Code Base	1m 10s
Spelling (.md)	42s
Check for case being inconsistent (docs)	7s
Link Checking (.mdx)	24s
Link Checking (.md)	16s
Spelling (.mdx)	54s
	8m 39s

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