grep: remove senseless test

It was pulling in a sizable data file and doesn't appear to be testing
anything meaningful that isn't covered by a variety of other tests.

grep/src/search.rs

@@ -315,42 +315,3 @@ impl<'b, 's> Iterator for Iter<'b, 's> {
         Some(mat)
     }
 }
-
-#[cfg(test)]
-mod tests {
-    use memchr::{memchr, memrchr};
-    use regex::bytes::Regex;
-
-    use super::{GrepBuilder, Match};
-
-    static SHERLOCK: &'static [u8] = include_bytes!("./data/sherlock.txt");
-
-    fn find_lines(pat: &str, haystack: &[u8]) -> Vec<Match> {
-        let re = Regex::new(pat).unwrap();
-        let mut lines = vec![];
-        for m in re.find_iter(haystack) {
-            let start = memrchr(b'\n', &haystack[..m.start()])
-                        .map_or(0, |i| i + 1);
-            let end = memchr(b'\n', &haystack[m.end()..])
-                      .map_or(haystack.len(), |i| m.end() + i + 1);
-            lines.push(Match {
-                start: start,
-                end: end,
-            });
-        }
-        lines
-    }
-
-    fn grep_lines(pat: &str, haystack: &[u8]) -> Vec<Match> {
-        let g = GrepBuilder::new(pat).build().unwrap();
-        g.iter(haystack).collect()
-    }
-
-    #[test]
-    fn buffered_literal() {
-        let expected = find_lines("Sherlock Holmes", SHERLOCK);
-        let got = grep_lines("Sherlock Holmes", SHERLOCK);
-        assert_eq!(expected.len(), got.len());
-        assert_eq!(expected, got);
-    }
-}