refactor: remove unused search state helpers

static/search/state.ts

@@ -32,7 +32,6 @@ let activeRequestController: AbortController | undefined;
 let nextSearchPage: number | undefined;
 let searchHasNextPage = false;
 let fetchingNextPage = false;
-let lastFocusedSearchOpener: HTMLElement | null = null;
 
 export const getResultItems = (): SearchItem[] => resultItems;
 
@@ -88,15 +87,6 @@ export const resetSearchResultsState = (): void => {
   fetchingNextPage = false;
 };
 
-export const rememberSearchOpener = (): void => {
-  lastFocusedSearchOpener =
-    document.activeElement instanceof HTMLElement ? document.activeElement : null;
-};
-
-export const focusLastSearchOpener = (): void => {
-  lastFocusedSearchOpener?.focus();
-};
-
 const maxCachedResponses = 20;
 
 const createResponseCache = () => {
@@ -154,8 +144,6 @@ export const typeLabels: Record<string, string> = {
 export const groupOrder = ["anime"];
 export const maxPosterImageRetries = 2;
 
-export const isMac = (): boolean => /Mac|iPhone|iPad|iPod/.test(navigator.platform);
-
 export const isTypingTarget = (target: EventTarget | null): boolean =>
   target instanceof HTMLInputElement ||
   target instanceof HTMLTextAreaElement ||