chore: Remove unused singleton for SentryNSProcessInfoWrapper (#5463)

Author: philprime

Sources/Sentry/SentryNSProcessInfoWrapper.mm

@@ -22,14 +22,6 @@ - (instancetype)init
 #    define SENTRY_BINARY_EXECUTABLE_PATH NSBundle.mainBundle.executablePath;
 #endif // defined(SENTRY_TEST) || defined(SENTRY_TEST_CI) || defined(DEBUG)
 
-+ (SentryNSProcessInfoWrapper *)shared
-{
-    static SentryNSProcessInfoWrapper *instance = nil;
-    static dispatch_once_t onceToken;
-    dispatch_once(&onceToken, ^{ instance = [[self alloc] init]; });
-    return instance;
-}
-
 - (NSString *)processDirectoryPath
 {
     return NSBundle.mainBundle.bundlePath;