Fix unused_parens warnings

Author: josephlr

src/elf.rs

@@ -701,7 +701,7 @@ impl Elf {
             }
         }
 
-        Ok((r))
+        Ok(r)
     }
     pub fn insert_section(&mut self, at: usize, sec: Section) -> Result<(), Error> {
         self.sections.insert(at, sec);

src/relocation.rs

@@ -188,6 +188,6 @@ impl Relocation {
 
         elf_write_u64!(eh, io, self.addend as u64)?;
 
-        Ok((8+8+8))
+        Ok(8+8+8)
     }
 }