[clangd] Remove unused declaration onCallHierarchyOutgoingCalls

The corresponding function definition was removed by:

  commit 1a929525e86a20d0b3455a400d0dbed40b325a13
  Author: Kadir Cetinkaya <kadircet@google.com>
  Date:   Tue Dec 21 17:06:40 2021 +0100

diff --git a/clang-tools-extra/clangd/ClangdLSPServer.h b/clang-tools-extra/clangd/ClangdLSPServer.h
index 33c8d22..332ff68 100644 (file)
--- a/clang-tools-extra/clangd/ClangdLSPServer.h
+++ b/clang-tools-extra/clangd/ClangdLSPServer.h
@@ -151,9 +151,6 @@ private:
   void onCallHierarchyIncomingCalls(
       const CallHierarchyIncomingCallsParams &,
       Callback<std::vector<CallHierarchyIncomingCall>>);
-  void onCallHierarchyOutgoingCalls(
-      const CallHierarchyOutgoingCallsParams &,
-      Callback<std::vector<CallHierarchyOutgoingCall>>);
   void onClangdInlayHints(const InlayHintsParams &,
                           Callback<llvm::json::Value>);
   void onInlayHint(const InlayHintsParams &, Callback<std::vector<InlayHint>>);