Update qnn_backend_manager.h

Fix bad merge

Author: milpuz01

onnxruntime/core/providers/qnn/builder/qnn_backend_manager.h

@@ -304,11 +304,6 @@ class QnnBackendManager : public std::enable_shared_from_this<QnnBackendManager>
 
   Status GetFileSizeIfValid(const std::string& filepath, size_t& file_size);
 
-  Status ReadContextBinIfValid(const std::string& context_bin_filepath,
-                               std::vector<char>& buffer);
-
-  Status GetFileSizeIfValid(const std::string& filepath, size_t& file_size);
-
   Status ReadContextBinIfValid(const std::string& context_bin_filepath,
                                std::vector<char>& buffer);