remove unused imports

src/parser.rs

@@ -1,13 +1,13 @@
 use std::char;
 
 use nom::{
-    branch::{alt, permutation},
-    bytes::streaming::{is_a, is_not, tag, tag_no_case, take, take_till, take_until, take_while},
+    branch::alt,
+    bytes::streaming::{is_a, tag, take, take_while},
     character::{
         complete::one_of,
-        streaming::{alpha1, char, digit1, none_of, satisfy},
+        streaming::{char, none_of, satisfy},
     },
-    combinator::{cond, map, map_parser, map_res, not, opt, peek, recognize, value, verify},
+    combinator::{map, not, opt, peek, recognize, value},
     error::{Error, ErrorKind},
     multi::{many0, many1, many_till},
     sequence::{delimited, pair, preceded, separated_pair, terminated, tuple},