Enhancement: remove deprecated helpers for ESLint context

[auvred]

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• I have searched for related issues and found none that match my proposal.
• I have searched the current rule list and found no rules that match my proposal.
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Relevant Package

utils

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Description

typescript-eslint/packages/utils/src/eslint-utils/context.ts

Lines 1 to 2 in b0f7aa4

	// Wrappers around ESLint's deprecation of existing methods
	/* eslint-disable deprecation/deprecation -- TODO - delete in the next major (v8) */

See https://eslint.org/blog/2023/09/preparing-custom-rules-eslint-v9/#from-context-to-sourcecode:

... we are deprecating all of the code-related methods on context and moving them to SourceCode

Additional Info

Followup for #8975 and #8399

Note:
The missing export related to these deprecated functions have been added in #8976 on the main branch, so it is better to wait until 1763889 is merged into v8 to avoid possible difficulties with merge conflicts.

[auvred]

#9000 was merged in v8