Fix to work on Rust 1.24.0 again and remove unused imports.

Author: cessen

scripts/unicode.py

@@ -281,6 +281,7 @@ def emit_break_module(f, break_table, break_cats, name):
     f.write("""    }
 
     fn bsearch_range_value_table(c: char, r: &'static [(char, char, %sCat)]) -> (u32, u32, %sCat) {
+        use core;
         use core::cmp::Ordering::{Equal, Less, Greater};
         match r.binary_search_by(|&(lo, hi, _)| {
             if lo <= c && c <= hi { Equal }

src/grapheme.rs

@@ -566,7 +566,6 @@ impl GraphemeCursor {
     /// assert_eq!(cursor.next_boundary(&s[2..4], 2), Ok(None));
     /// ```
     pub fn next_boundary(&mut self, chunk: &str, chunk_start: usize) -> Result<Option<usize>, GraphemeIncomplete> {
-        use tables::grapheme as gr;
         if self.offset == self.len {
             return Ok(None);
         }
@@ -642,7 +641,6 @@ impl GraphemeCursor {
     /// assert_eq!(cursor.prev_boundary(&s[0..2], 0), Ok(None));
     /// ```
     pub fn prev_boundary(&mut self, chunk: &str, chunk_start: usize) -> Result<Option<usize>, GraphemeIncomplete> {
-        use tables::grapheme as gr;
         if self.offset == 0 {
             return Ok(None);
         }

src/tables.rs

@@ -346,6 +346,7 @@ pub mod grapheme {
     }
 
     fn bsearch_range_value_table(c: char, r: &'static [(char, char, GraphemeCat)]) -> (u32, u32, GraphemeCat) {
+        use core;
         use core::cmp::Ordering::{Equal, Less, Greater};
         match r.binary_search_by(|&(lo, hi, _)| {
             if lo <= c && c <= hi { Equal }
@@ -987,6 +988,7 @@ pub mod word {
     }
 
     fn bsearch_range_value_table(c: char, r: &'static [(char, char, WordCat)]) -> (u32, u32, WordCat) {
+        use core;
         use core::cmp::Ordering::{Equal, Less, Greater};
         match r.binary_search_by(|&(lo, hi, _)| {
             if lo <= c && c <= hi { Equal }
@@ -1452,6 +1454,7 @@ pub mod emoji {
     }
 
     fn bsearch_range_value_table(c: char, r: &'static [(char, char, EmojiCat)]) -> (u32, u32, EmojiCat) {
+        use core;
         use core::cmp::Ordering::{Equal, Less, Greater};
         match r.binary_search_by(|&(lo, hi, _)| {
             if lo <= c && c <= hi { Equal }
@@ -1554,6 +1557,7 @@ pub mod sentence {
     }
 
     fn bsearch_range_value_table(c: char, r: &'static [(char, char, SentenceCat)]) -> (u32, u32, SentenceCat) {
+        use core;
         use core::cmp::Ordering::{Equal, Less, Greater};
         match r.binary_search_by(|&(lo, hi, _)| {
             if lo <= c && c <= hi { Equal }