fix rocksdb-specific lints

Signed-off-by: strawberry <strawberry@puppygock.gay>

src/database/abstraction/rocksdb.rs

@@ -208,7 +208,7 @@ fn iter<'a>(&'a self) -> Box<dyn Iterator<Item = (Vec<u8>, Vec<u8>)> + 'a> {
             self.db
                 .rocks
                 .iterator_cf(&self.cf(), rocksdb::IteratorMode::Start)
-                .map(|r| r.unwrap())
+                .map(std::result::Result::unwrap)
                 .map(|(k, v)| (Vec::from(k), Vec::from(v))),
         )
     }
@@ -232,7 +232,7 @@ fn iter_from<'a>(
                         },
                     ),
                 )
-                .map(|r| r.unwrap())
+                .map(std::result::Result::unwrap)
                 .map(|(k, v)| (Vec::from(k), Vec::from(v))),
         )
     }
@@ -273,7 +273,7 @@ fn scan_prefix<'a>(
                     &self.cf(),
                     rocksdb::IteratorMode::From(&prefix, rocksdb::Direction::Forward),
                 )
-                .map(|r| r.unwrap())
+                .map(std::result::Result::unwrap)
                 .map(|(k, v)| (Vec::from(k), Vec::from(v)))
                 .take_while(move |(k, _)| k.starts_with(&prefix)),
         )