[Distributed] always emit the distributed thunk

Author: ktoso

lib/SILGen/SILGen.cpp

@@ -1299,8 +1299,7 @@ void SILGenModule::emitAbstractFuncDecl(AbstractFunctionDecl *AFD) {
 
   if (AFD->isDistributed()) {
     auto thunk = SILDeclRef(AFD).asDistributed();
-    if (!hasFunction(thunk))
-      emitDistributedThunk(thunk);
+    emitDistributedThunk(thunk);
   }
 }