[clang] [clang][dataflow] Refactor processing of terminator element (PR #84499)

[via cfe-commits]

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@@ -64,88 +62,27 @@ static bool isBackedgeNode(const CFGBlock &B) {
 
 namespace {
 
-// The return type of the visit functions in TerminatorVisitor. The first
-// element represents the terminator expression (that is the conditional
-// expression in case of a path split in the CFG). The second element
-// represents whether the condition was true or false.
-using TerminatorVisitorRetTy = std::pair<const Expr *, bool>;
-
-/// Extends the flow condition of an environment based on a terminator
-/// statement.
+/// Extracts the condition expression.
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martinboehme wrote:

```suggestion
/// Extracts the terminator condition expression.
```

https://github.com/llvm/llvm-project/pull/84499