Fix llsd operator

indra/llcommon/llsd.cpp

@@ -870,7 +870,7 @@ void LLSD::assign(const LLSD& other)    { Impl::assign(impl, other.impl); }
 
 LLSD::LLSD(LLSD&& other) noexcept : impl(nullptr) { ALLOC_LLSD_OBJECT;  Impl::move(impl, other.impl); }
 void  LLSD::assign(LLSD&& other) { Impl::move(impl, other.impl); }
-LLSD& LLSD::operator=(LLSD&& other) noexcept { Impl::move(impl, other.impl); return *this; }
+LLSD& LLSD::operator=(LLSD&& other) { Impl::move(impl, other.impl); return *this; }
 
 void LLSD::clear()                      { Impl::assignUndefined(impl); }
 

indra/llcommon/llsd.h

@@ -168,7 +168,7 @@ class LL_COMMON_API LLSD final
     //@{
         LLSD(LLSD&& other) noexcept;
         void  assign(LLSD&& other);
-        LLSD& operator=(LLSD&& other) noexcept;
+        LLSD& operator=(LLSD&& other);
     //@}
 
     void clear();   ///< resets to Undefined