ioc: Remove redundant SPC_ATTRIBUTE condition

dbPut() enforces

Author: mdavidsaver

ioc/iocsource.cpp

@@ -362,9 +362,7 @@ void IOCSource::get(Value& node, // node within top level structure addressed by
 void
 IOCSource::doPreProcessing(dbChannel* pDbChannel, SecurityLogger& securityLogger, const Credentials& credentials,
         const SecurityClient& securityClient) {
-    if (pDbChannel->addr.special == SPC_ATTRIBUTE) {
-        throw std::runtime_error("Unable to put value: Modifications not allowed: S_db_noMod");
-    } else if (pDbChannel->addr.precord->disp && pDbChannel->addr.pfield != &pDbChannel->addr.precord->disp) {
+    if (pDbChannel->addr.precord->disp && pDbChannel->addr.pfield != &pDbChannel->addr.precord->disp) {
         throw std::runtime_error("Unable to put value: Field Disabled: S_db_putDisabled");
     }