Remove Nop instruction

I forget what it was used for but it's not being used now.

Signed-off-by: Alek Ratzloff <alekratz@gmail.com>

src/disassemble.rs

@@ -109,11 +109,6 @@ fn disassemble_chunk(chunk: &Chunk, globals: &Vec<String>, constants: &Vec<ObjP>
                 arg = format!("{len}");
                 info = String::new();
             }
-            Op::Nop => {
-                op_str = "NOP";
-                arg = String::new();
-                info = String::new();
-            }
             Op::EvalModule => {
                 op_str = "EVAL_MODULE";
                 arg = String::new();

src/vm.rs

@@ -34,7 +34,6 @@ pub enum Op {
     BuildList(ListLen),
 
     // VM control
-    Nop,
     EvalModule,
     ExitModule,
 }
@@ -462,9 +461,6 @@ impl<'c> Vm<'c> {
                     let list = List::create(list_items);
                     self.push(list);
                 }
-                Op::Nop => {
-                    continue;
-                }
                 Op::EvalModule => {
                     // check if the module has been evaluated yet
                     let module = self.peek();