[apps/graph][apps/sequence] In function store model, specify the

implementation of removeAll (always let an empty function in cartesian
functions)

Change-Id: I5e91a0ea427ba823eee4f86cdd8b7cd5426df2c6

apps/shared/function_store.cpp

@@ -62,10 +62,4 @@ int FunctionStore::numberOfDefinedFunctions() {
   return result;
 }
 
-void FunctionStore::removeAll() {
-  for (int i = 0; i < numberOfFunctions(); i++) {
-    removeFunction(functionAtIndex(i));
-  }
-}
-
 }