fix(test): drop duplicate testStartBeforeBreadcrumbs… method

The migration in the previous commit added a `testStart…KeepsBreadcrumbWhenDevServerUrlIsNotPassed…`
method that already existed in the `RNSentryStart Tests` block. Compile failed
in CI with "Duplicate declaration of method". The earlier
`@interface RNSentryStart Tests` already covers this scenario; the migrated
copy is redundant.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: antonis

packages/core/RNSentryCocoaTester/RNSentryCocoaTesterTests/RNSentryTests.m

@@ -819,27 +819,6 @@ - (void)testStartCreateOptionsWithDictionaryEnableLogsDisabled
     XCTAssertFalse(enableLogs, @"enableLogs should be disabled");
 }
 
-#pragma mark - RNSentryStart beforeBreadcrumb edge case
-
-- (void)
-    testStartBeforeBreadcrumbsCallbackKeepsBreadcrumbWhenDevServerUrlIsNotPassedAndDsnDoesNotMatch
-{
-    NSError *error = nil;
-
-    NSDictionary *_Nonnull mockedDictionary = @{ // dsn is always validated in SentryOptions initialization
-        @"dsn" : @"https://abc@def.ingest.sentry.io/1234567"
-    };
-    SentryOptions *options = [RNSentryStart createOptionsWithDictionary:mockedDictionary
-                                                                  error:&error];
-    SentryBreadcrumb *breadcrumb = [[SentryBreadcrumb alloc] init];
-    breadcrumb.type = @"http";
-    breadcrumb.data = @{ @"url" : @"http://testurl.com/service" };
-
-    SentryBreadcrumb *result = options.beforeBreadcrumb(breadcrumb);
-
-    XCTAssertEqual(breadcrumb, result);
-}
-
 #pragma mark - RNSentryStart ignoreErrors Tests
 
 - (void)testStartIgnoreErrorsDropsMatchingExceptionValue