remove Clippy flags from the PR template (nushell#10087)

related to
- nushell#10072
- nushell#10073

cc/ @sholderbach 

# Description
i think the PR template was the missing place where a `cargo clippy`
appears 😏

.github/pull_request_template.md

@@ -24,7 +24,7 @@ Don't forget to add tests that cover your changes.
 Make sure you've run and fixed any issues with these commands:
 
 - `cargo fmt --all -- --check` to check standard code formatting (`cargo fmt --all` applies these changes)
-- `cargo clippy --workspace -- -D warnings -D clippy::unwrap_used -A clippy::needless_collect -A clippy::result_large_err` to check that you're using the standard code style
+- `cargo clippy --workspace -- -D warnings -D clippy::unwrap_used` to check that you're using the standard code style
 - `cargo test --workspace` to check that all tests pass
 - `cargo run -- -c "use std testing; testing run-tests --path crates/nu-std"` to run the tests for the standard library