Remove timezone handling

There are too many issues in chrono-tz to make it worth supporting.

src/lib.rs

@@ -977,15 +977,8 @@ impl Parser {
                 *tzinfos.get(res.tzname.as_ref().unwrap()).unwrap(),
             )))
         } else if res.tzname.is_some() {
-            let tzname = res.tzname.as_ref().unwrap();
-            let tz: Result<Tz, String> = tzname.parse();
-            if tz.is_ok() {
-                let offset = tz.unwrap().offset_from_local_datetime(dt).unwrap().fix();
-                Ok(Some(offset))
-            } else {
-                println!("tzname {} identified but not understood ({}). Ignoring for the time being, but behavior is subject to change.", tzname, tz.unwrap_err());
-                Ok(None)
-            }
+            println!("tzname {} identified but not understood.", tzname);
+            Ok(None)
         } else {
             Err(ParseError::TimezoneUnsupported)
         }

src/tests/mod.rs

@@ -1,4 +1,3 @@
 mod fuzzing;
 mod pycompat_parser;
 mod pycompat_tokenizer;
-mod tz;

src/tests/tz.rs

@@ -1,20 +0,0 @@
-use parse;
-
-#[test]
-fn est() {
-    // Issue originally reported in https://github.com/bspeice/dtparse/issues/18
-    let dt = parse("Fri, 21 Aug 2015 18:37:44 EST");
-
-    assert!(dt.is_ok());
-    assert!(dt.unwrap().1.is_some());
-}
-
-#[test]
-fn cest() {
-    // Issue originally reported in https://github.com/bspeice/dtparse/issues/18
-    let dt = parse("Fri, 21 Aug 2015 18:37:44 CEST");
-
-    assert!(dt.is_ok());
-    // TODO: Fix
-    // assert!(dt.unwrap().1.is_some());
-}