Remove duplicate group definition that snuck in due to a merge conflict.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@127671 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/clang/Basic/DiagnosticGroups.td b/include/clang/Basic/DiagnosticGroups.td
index 4d3eec0..3f23d32 100644
--- a/include/clang/Basic/DiagnosticGroups.td
+++ b/include/clang/Basic/DiagnosticGroups.td
@@ -200,10 +200,6 @@
                         UnusedValue, UnusedVariable]>,
                         DiagCategory<"Unused Entity Issue">;
 
-def Uninitialized : DiagGroup<"uninitialized",
-                              [UninitializedMaybe]>,
-                              DiagCategory<"Uninitialized Value Issues">;
-
 // Format settings.
 def FormatSecurity : DiagGroup<"format-security">;
 def Format : DiagGroup<"format",