[lldb] Remove a redundant call to std::unique_ptr<T>::get (NFC) (#151283)

Author: kazutakahirata

lldb/source/Interpreter/ScriptInterpreter.cpp

@@ -119,7 +119,7 @@ lldb::StreamSP ScriptInterpreter::GetOpaqueTypeFromSBStream(
 SymbolContext ScriptInterpreter::GetOpaqueTypeFromSBSymbolContext(
     const lldb::SBSymbolContext &sb_sym_ctx) const {
   if (sb_sym_ctx.m_opaque_up)
-    return *sb_sym_ctx.m_opaque_up.get();
+    return *sb_sym_ctx.m_opaque_up;
   return {};
 }