Remove nightly features from rustfmt.toml

Author: lorisleiva

.changeset/bright-trains-glow.md

@@ -0,0 +1,5 @@
+---
+"create-solana-program": patch
+---
+
+Remove nightly features from rustfmt.toml

template/base/rustfmt.toml

@@ -1,8 +1,10 @@
 max_width = 100
-imports_indent = "Block"
-imports_layout = "Mixed"
-imports_granularity = "Crate"
-group_imports = "Preserve"
 reorder_imports = true
 reorder_modules = true
-reorder_impl_items = false
+
+# == Nightly only. ==
+# imports_indent = "Block"
+# imports_layout = "Mixed"
+# imports_granularity = "Crate"
+# group_imports = "Preserve"
+# reorder_impl_items = false