Cleaned dead code and updated documents

protocol/mizan-codegen/tests/fixtures/baselines/react/react.tsx

@@ -14,10 +14,8 @@ import {
 } from 'react'
 import {
     configure,
-    initSession,
     mizanCall,
     mizanFetch,
-    MizanError,
     registerContext,
     type ContextState,
 } from '@mizan/base'
@@ -45,6 +43,7 @@ function useContextSubscription<T>(
     return useSyncExternalStore(handle.subscribe, handle.getState, handle.getState)
 }
 
+
 // Internal — wraps an imperative call() with isPending / error state.
 interface MutationHook<TArgs, TResult> {
     mutate: (args: TArgs) => Promise<TResult>