Update Store.swift

Author: stephencelis

Sources/ComposableArchitecture/Store.swift

@@ -173,12 +173,6 @@ public final class Store<State, Action> {
   /// .task { await store.send(.task).finish() }
   /// ```
   ///
-  /// > Important: The ``Store`` is not thread safe and you should only send actions to it from the
-  /// > main thread. If you want to send actions on background threads due to the fact that the
-  /// > reducer is performing computationally expensive work, then a better way to handle this is to
-  /// > wrap that work in an ``Effect`` that is performed on a background thread so that the
-  /// > result can be fed back into the store.
-  ///
   /// - Parameter action: An action.
   /// - Returns: A ``StoreTask`` that represents the lifecycle of the effect executed when
   ///   sending the action.