Remove warning in README

Author: penelopeysm

README.md

@@ -286,10 +286,6 @@ A curated list of popular crates can be found on [blessred.rs](https://blessed.r
 
 Do you have aoc-specific crate recommendations? [Share them!](https://github.com/fspoettel/advent-of-code-rust/edit/main/README.md)
 
-## Common pitfalls
-
--   **Integer overflows:** This template uses 32-bit integers by default because it is generally faster - for example when packed in large arrays or structs - than using 64-bit integers everywhere. For some problems, solutions for real input might exceed 32-bit integer space. While this is checked and panics in `debug` mode, integers [wrap](https://doc.rust-lang.org/book/ch03-02-data-types.html#integer-overflow) in `release` mode, leading to wrong output when running your solution.
-
 ## Footnotes
 
 [^1]: The session cookie might expire after a while (~1 month) which causes the downloads to fail. To fix this issue, refresh the `.adventofcode.session` file.