message: Remove closeSession.
diff: @@ -214,22 +214,15 @@ export class ApplicationComponent extends React.Component<{}, ApplicationState>
  }
  closeFocusedSession() {
  - this.closeSession(
  - this.state.focusedTabIndex,
  - this.state.tabs[this.state.focusedTabIndex].focusedSessionIndex,
  - );
  - }
  -
  - closeSession(tabIndex: number, sessionIndex: number) {
  const state = this.cloneState();
  - const tabState = state.tabs[tabIndex];
  + const tabState = state.tabs[state.focusedTabIndex];
  if (tabState.sessions.length === 1) {
  - this.closeTab(tabIndex);
  + this.closeFocusedTab();
  } else {
  - tabState.sessions[sessionIndex].prepareForClosing();
  + tabState.sessions[tabState.focusedSessionIndex].prepareForClosing();
  - tabState.sessions.splice(sessionIndex, 1);
  + tabState.sessions.splice(tabState.focusedSessionIndex, 1);
  tabState.focusedSessionIndex = 0;
  this.setState(state, () => this.resizeFocusedTabSessions());
  