fix(iOS): Resolve exception thrown when using getAll

* Remove unused getAll function

* Update getAll in README

Author: safaiyeh

README.md

@@ -111,7 +111,8 @@ CookieManager.get('http://example.com')
   });
 
 // list cookies (IOS ONLY)
-CookieManager.getAll()
+// useWebKit: boolean
+CookieManager.getAll(useWebKit)
   .then((res) => {
     console.log('CookieManager.getAll =>', res);
   });

ios/RNCookieManagerIOS/RNCookieManagerIOS.m

@@ -230,21 +230,6 @@ -(NSString *)getDomainName:(NSURL *) url
     }
 }
 
-RCT_EXPORT_METHOD(getAll:(RCTPromiseResolveBlock)resolve
-    rejecter:(RCTPromiseRejectBlock)reject) {
-    NSHTTPCookieStorage *cookieStorage = [NSHTTPCookieStorage sharedHTTPCookieStorage];
-    NSMutableDictionary *cookies = [NSMutableDictionary dictionary];
-    for (NSHTTPCookie *c in cookieStorage.cookies) {
-        NSMutableDictionary *d = [NSMutableDictionary dictionary];
-        [d setObject:c.value forKey:@"value"];
-        [d setObject:c.name forKey:@"name"];
-        [d setObject:c.domain forKey:@"domain"];
-        [d setObject:c.path forKey:@"path"];
-        [d setObject:[self.formatter stringFromDate:c.expiresDate] forKey:@"expiresDate"];
-        [cookies setObject:d forKey:c.name];
-    }
-}
-
 -(NSDictionary *)createCookieList:(NSArray<NSHTTPCookie *>*)cookies
 {
     NSMutableDictionary *cookieList = [NSMutableDictionary dictionary];