Remove Nostr-related stuff

Signed-off-by: marcin mikołajczak <git@mkljczk.pl>

src/contexts/nostr-context.tsx

@@ -1,57 +0,0 @@
-import { NRelay, NRelay1, NostrSigner } from '@soapbox/nspec';
-import React, { createContext, useContext, useState, useEffect, useMemo } from 'react';
-
-import { NKeys } from 'soapbox/features/nostr/keys';
-import { useOwnAccount } from 'soapbox/hooks';
-import { useInstance } from 'soapbox/hooks/useInstance';
-
-interface NostrContextType {
-  relay?: NRelay;
-  pubkey?: string;
-  signer?: NostrSigner;
-}
-
-const NostrContext = createContext<NostrContextType | undefined>(undefined);
-
-interface NostrProviderProps {
-  children: React.ReactNode;
-}
-
-export const NostrProvider: React.FC<NostrProviderProps> = ({ children }) => {
-  const instance = useInstance();
-  const [relay, setRelay] = useState<NRelay1>();
-
-  const { account } = useOwnAccount();
-
-  const url = instance.nostr?.relay;
-  const pubkey = instance.nostr?.pubkey;
-  const accountPubkey = account?.nostr.pubkey;
-
-  const signer = useMemo(
-    () => (accountPubkey ? NKeys.get(accountPubkey) : undefined) ?? window.nostr,
-    [accountPubkey],
-  );
-
-  useEffect(() => {
-    if (url) {
-      setRelay(new NRelay1(url));
-    }
-    return () => {
-      relay?.close();
-    };
-  }, [url]);
-
-  return (
-    <NostrContext.Provider value={{ relay, pubkey, signer }}>
-      {children}
-    </NostrContext.Provider>
-  );
-};
-
-export const useNostr = () => {
-  const context = useContext(NostrContext);
-  if (context === undefined) {
-    throw new Error('useNostr must be used within a NostrProvider');
-  }
-  return context;
-};