ci: prefer clippy::default_trait_access over shell (#31318)

Prefer clippy::default_trait_access over shell

ci/nits.sh

@@ -41,16 +41,6 @@ if _ git --no-pager grep -n "${prints[@]/#/-e}" -- "${print_free_tree[@]}"; then
     exit 1
 fi
 
-
-# Code readability: please be explicit about the type instead of using
-# Default::default()
-#
-# Ref: https://github.com/solana-labs/solana/issues/2630
-if _ git --no-pager grep -n 'Default::default()' -- '*.rs'; then
-    exit 1
-fi
-
-
 # Github Issues should be used to track outstanding work items instead of
 # marking up the code
 #

ci/test-checks.sh

@@ -76,6 +76,7 @@ nightly_clippy_allows=()
 # run nightly clippy for `sdk/` as there's a moderate amount of nightly-only code there
  _ scripts/cargo-for-all-lock-files.sh -- "+${rust_nightly}" clippy --workspace --all-targets --features dummy-for-ci-check -- \
    --deny=warnings \
+   --deny=clippy::default_trait_access \
    --deny=clippy::integer_arithmetic \
    "${nightly_clippy_allows[@]}"