Remove date range for LICENSE (#3991)

While updating the date ranges for multiple PRs, Michi pointed out that
we don't need date ranges for our licenses. I'm sorry about the fuzz.

In our internal [Open Source Legal
Policy](https://www.notion.so/sentry/Open-Source-Legal-Policy-ac4885d265cb4d7898a01c060b061e42),
we decided that licenses don't require a data range. This also has the
advantage of not updating the date range yearly.

Author: philipphofmann

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2018-2025 Functional Software, Inc. dba Sentry
+Copyright (c) 2018 Functional Software, Inc. dba Sentry
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal