Tidy up unneeded references.

lib/cretonne/meta/gen_legalizer.py

@@ -363,7 +363,7 @@ def gen_xform_group(xgrp, fmt, type_sets):
     with fmt.indented(') -> bool {', '}'):
         fmt.line('use ir::InstBuilder;')
         fmt.line('use cursor::{Cursor, FuncCursor};')
-        fmt.line('let pos = &mut FuncCursor::new(func).at_inst(inst);')
+        fmt.line('let mut pos = FuncCursor::new(func).at_inst(inst);')
         fmt.line('pos.use_srcloc(inst);')
 
         # Group the xforms by opcode so we can generate a big switch.

lib/cretonne/src/flowgraph.rs

@@ -195,7 +195,7 @@ mod tests {
         let jmp_ebb1_ebb2;
 
         {
-            let cur = &mut FuncCursor::new(&mut func);
+            let mut cur = FuncCursor::new(&mut func);
 
             cur.insert_ebb(ebb0);
             br_ebb0_ebb2 = cur.ins().brnz(cond, ebb2, &[]);