[clang-tools-extra] [clang-doc][NFC] Remove else after return (PR #136443)

[Petr Hosek via cfe-commits]

================
@@ -261,7 +261,7 @@ static bool isPublic(const clang::AccessSpecifier AS,
                      const clang::Linkage Link) {
   if (AS == clang::AccessSpecifier::AS_private)
     return false;
-  else if ((Link == clang::Linkage::Module) ||
+  if ((Link == clang::Linkage::Module) ||
            (Link == clang::Linkage::External))
----------------
petrhosek wrote:

```suggestion
  if ((Link == clang::Linkage::Module) ||
      (Link == clang::Linkage::External))
```

https://github.com/llvm/llvm-project/pull/136443