fix: clippy issues

src/cpu.rs

@@ -67,7 +67,7 @@ impl Cpu {
             halted: false,
             mmu,
             cycles: 0,
-            gbc: gbc,
+            gbc,
         }
     }
 

src/mmu.rs

@@ -90,7 +90,7 @@ impl Mmu {
             ram_bank: 0x1,
             ram_offset: 0x1000,
             ie: 0x0,
-            gbc: gbc,
+            gbc,
         }
     }