Reformat imports to a consistent style for imports

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

sdk/program/src/sysvar/rent.rs

@@ -1,7 +1,6 @@
 //! This account contains the current cluster rent
 //!
 pub use crate::rent::Rent;
-
 use crate::{impl_sysvar_get, program_error::ProgramError, sysvar::Sysvar};
 
 crate::declare_sysvar_id!("SysvarRent111111111111111111111111111111111", Rent);