diff --git a/src/shared/store/index.js b/src/shared/store/index.js
deleted file mode 100644
index 2fafdf1..0000000
--- a/src/shared/store/index.js
+++ /dev/null
@@ -1,53 +0,0 @@
-class Store {
-  constructor(reducer, catcher) {
-    this.reducer = reducer;
-    this.catcher = catcher;
-    this.subscribers = [];
-    try {
-      this.state = this.reducer(undefined, {});
-    } catch (e) {
-      catcher(e);
-    }
-  }
-
-  dispatch(action, sender) {
-    if (action instanceof Promise) {
-      action.then((a) => {
-        this.transitNext(a, sender);
-      }).catch((e) => {
-        this.catcher(e, sender);
-      });
-    } else {
-      try {
-        this.transitNext(action, sender);
-      } catch (e) {
-        this.catcher(e, sender);
-      }
-    }
-    return action;
-  }
-
-  getState() {
-    return this.state;
-  }
-
-  subscribe(callback) {
-    this.subscribers.push(callback);
-  }
-
-  transitNext(action, sender) {
-    let newState = this.reducer(this.state, action);
-    if (JSON.stringify(this.state) !== JSON.stringify(newState)) {
-      this.state = newState;
-      this.subscribers.forEach(f => f(sender));
-    }
-  }
-}
-
-const empty = () => {};
-
-const createStore = (reducer, catcher = empty) => {
-  return new Store(reducer, catcher);
-};
-
-export { createStore };
diff --git a/src/shared/store/provider.jsx b/src/shared/store/provider.jsx
deleted file mode 100644
index fe925aa..0000000
--- a/src/shared/store/provider.jsx
+++ /dev/null
@@ -1,15 +0,0 @@
-import { h, Component } from 'preact';
-
-class Provider extends Component {
-  getChildContext() {
-    return { store: this.props.store };
-  }
-
-  render() {
-    return <div>
-      { this.props.children }
-    </div>;
-  }
-}
-
-export default Provider;
diff --git a/test/shared/store/index.test.js b/test/shared/store/index.test.js
deleted file mode 100644
index 5b69b40..0000000
--- a/test/shared/store/index.test.js
+++ /dev/null
@@ -1,110 +0,0 @@
-import { createStore } from 'shared/store';
-
-describe("Store class", () => {
-  const reducer = (state, action) => {
-    if (state == undefined) {
-      return 0;
-    }
-    return state + action;
-  };
-
-  describe("#dispatch", () => {
-    it('transit status by immediate action', () => {
-      let store = createStore(reducer);
-      store.dispatch(10);
-      expect(store.getState()).to.equal(10);
-
-      store.dispatch(-20);
-      expect(store.getState()).to.equal(-10);
-    });
-
-    it('returns next state by immediate action', () => {
-      let store = createStore(reducer);
-      let dispatchedAction = store.dispatch(11);
-      expect(dispatchedAction).to.equal(11);
-    });
-
-    it('transit status by Promise action', () => {
-      let store = createStore(reducer);
-      let p1 = Promise.resolve(10);
-
-      return store.dispatch(p1).then(() => {
-        expect(store.getState()).to.equal(10);
-      }).then(() => {
-        store.dispatch(Promise.resolve(-20));
-      }).then(() => {
-        expect(store.getState()).to.equal(-10);
-      });
-    });
-
-    it('returns next state by promise action', () => {
-      let store = createStore(reducer);
-      let dispatchedAction = store.dispatch(Promise.resolve(11));
-      return dispatchedAction.then((value) => {
-        expect(value).to.equal(11);
-      });
-    });
-  });
-
-  describe("#subscribe", () => {
-    it('invoke callback', (done) => {
-      let store = createStore(reducer);
-      store.subscribe(() => {
-        expect(store.getState()).to.equal(15);
-        done();
-      });
-      store.dispatch(15);
-    });
-
-    it('propagate sender object', (done) => {
-      let store = createStore(reducer);
-      store.subscribe((sender) => {
-        expect(sender).to.equal('sender');
-        done();
-      });
-      store.dispatch(15, 'sender');
-    });
-  })
-
-  describe("catcher", () => {
-    it('catch an error in reducer on initializing by immediate action', (done) => {
-      let store = createStore(() => {
-        throw new Error();
-      }, (e) => {
-        expect(e).to.be.an('error');
-        done();
-      });
-    });
-
-    it('catch an error in reducer on initializing by immediate action', (done) => {
-      let store = createStore((state, action) => {
-        if (state === undefined) return 0;
-        throw new Error();
-      }, (e) => {
-        expect(e).to.be.an('error');
-        done();
-      });
-      store.dispatch(20);
-    });
-
-    it('catch an error in reducer on initializing by promise action', (done) => {
-      let store = createStore((state, action) => {
-        if (state === undefined) return 0;
-        throw new Error();
-      }, (e) => {
-        expect(e).to.be.an('error');
-        done();
-      });
-      store.dispatch(Promise.resolve(20));
-    });
-
-    it('catch an error in promise action', (done) => {
-      let store = createStore((state, action) => 0, (e) => {
-        expect(e).to.be.an('error');
-        done();
-      });
-      store.dispatch(new Promise(() => { throw new Error() }));
-    });
-  })
-});
-