Remove manual implementation of ok

New rustc nightly gives error: manual implementation of `ok`.

Remove it.

bitcoin/src/blockdata/script/instruction.rs

@@ -47,12 +47,7 @@ impl Instruction<'_> {
                     _ => None,
                 }
             }
-            Instruction::PushBytes(bytes) => {
+            Instruction::PushBytes(bytes) => super::read_scriptint_non_minimal(bytes.as_bytes()).ok(),
-                match super::read_scriptint_non_minimal(bytes.as_bytes()) {
-                    Ok(v) => Some(v),
-                    _ => None,
-                }
-            }
         }
     }
 
@@ -78,10 +73,7 @@ impl Instruction<'_> {
                     _ => None,
                 }
             }
-            Instruction::PushBytes(bytes) => match bytes.read_scriptint() {
+            Instruction::PushBytes(bytes) => bytes.read_scriptint().ok(),
-                Ok(v) => Some(v),
-                _ => None,
-            },
         }
     }
 }