[clang] [clang] NFC: Remove unused `FileEntry::getLastRef()` (PR #68156)

[via cfe-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-clang

<details>
<summary>Changes</summary>

The last usage of the deprecated `FileEntry::getLastRef()` was removed in #<!-- -->67838, let's remove it entirely.

---
Full diff: https://github.com/llvm/llvm-project/pull/68156.diff


1 Files Affected:

- (modified) clang/include/clang/Basic/FileEntry.h (-1) 


``````````diff
diff --git a/clang/include/clang/Basic/FileEntry.h b/clang/include/clang/Basic/FileEntry.h
index c377aba2c1d2ebd..23237a9326f84b6 100644
--- a/clang/include/clang/Basic/FileEntry.h
+++ b/clang/include/clang/Basic/FileEntry.h
@@ -426,7 +426,6 @@ class FileEntry {
 public:
   ~FileEntry();
   StringRef getName() const { return LastRef->getName(); }
-  FileEntryRef getLastRef() const { return *LastRef; }
 
   StringRef tryGetRealPathName() const { return RealPathName; }
   off_t getSize() const { return Size; }

``````````

</details>


https://github.com/llvm/llvm-project/pull/68156