Revert "Merge remote-tracking branch 'origin/topic/vern/at-if-analyze'"

This reverts commit 4e797ddbbc, reversing
changes made to 3ac28ba5a2.

src/Scope.cc

@@ -46,19 +46,6 @@ const IDPtr& Scope::Find(std::string_view name) const
 	return ID::nil;
 	}
 
-void Scope::RemoveGlobal(std::string name, IDPtr /* gid */)
-	{
-	ASSERT(this == global_scope());
-
-	local.erase(name);
-
-	// We could remove the identifier from ordered_vars, but for now
-	// we skip doing so because (1) the only removals we do are for global
-	// scope (per the method name), and the only use of ordered_vars is
-	// for traversing function parameters (i.e., non-global scope), and
-	// (2) it would be a pain to do so given the current data structure.
-	}
-
 IDPtr Scope::GenerateTemporary(const char* name)
 	{
 	return make_intrusive<ID>(name, SCOPE_FUNCTION, false);