Reformat imports to a consistent style for imports

rustfmt.toml configuration:
  imports_granularity = "One"
  group_imports = "One"

sdk/program/src/decode_error.rs

@@ -13,8 +13,7 @@ pub trait DecodeError<E> {
 
 #[cfg(test)]
 mod tests {
-    use super::*;
-    use num_derive::FromPrimitive;
+    use {super::*, num_derive::FromPrimitive};
 
     #[test]
     fn test_decode_custom_error_to_enum() {