Remove unused JSGlobalAugmentations

[jakebailey]

This is unused.

[Copilot]

Pull Request Overview

This PR removes the unused JSGlobalAugmentations from the AST and binder logic to clean up dead code.

• Deleted the JSGlobalAugmentations lookup in Binder.lookupName
• Removed the JSGlobalAugmentations field and its copy logic from SourceFile

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
internal/binder/binder.go	Removed code block that retrieved JSGlobalAugmentations symbols
internal/ast/ast.go	Deleted JSGlobalAugmentations field and its copy in copyFrom

Comments suppressed due to low confidence (3)

internal/ast/ast.go:10033

• Verify that SymbolTable is no longer needed; if it's only used for JSGlobalAugmentations, remove its import and definition to avoid unused declarations.

JSGlobalAugmentations SymbolTable // !!! remove me

internal/ast/ast.go:10132

• Since JSGlobalAugmentations is removed, ensure that copyFrom still correctly initializes all necessary fields and that no consumers rely on this assignment.

node.JSGlobalAugmentations = other.JSGlobalAugmentations

internal/binder/binder.go:1225

• After removing the JSGlobalAugmentations lookup, double-check that symbol resolution behavior remains correct and update or add tests to cover any changed code paths.

if ast.IsSourceFile(container) {

[sandersn]

js global augmentations were the worst