[bazel] Remove internal headers from `hdrs` in //clang:format (#122987)

They are already included in `srcs`, as they should be.
diff --git a/utils/bazel/llvm-project-overlay/clang/BUILD.bazel b/utils/bazel/llvm-project-overlay/clang/BUILD.bazel
index 47e6320..f918cd1 100644
--- a/utils/bazel/llvm-project-overlay/clang/BUILD.bazel
+++ b/utils/bazel/llvm-project-overlay/clang/BUILD.bazel
@@ -1515,13 +1515,7 @@
             "lib/Format/*.h",
         ],
     ),
-    hdrs = [
-        "lib/Format/FormatTokenLexer.h",
-        "lib/Format/FormatTokenSource.h",
-        "lib/Format/Macros.h",
-        "lib/Format/QualifierAlignmentFixer.h",
-        "lib/Format/UnwrappedLineParser.h",
-    ] + glob([
+    hdrs = glob([
         "include/clang/Format/*.h",
     ]),
     includes = ["include"],