Further simplify code

lib/nexrad/afos.py

@@ -3,8 +3,6 @@ import enum
 import datetime
 import shapely
 
-from typing import Self
-
 from nexrad.db    import DatabaseTable
 from nexrad.coord import COORD_SYSTEM
 from nexrad.vtec  import VTECEvent
@@ -220,21 +218,26 @@ class AFOSMessageParser():
     def parse_body(self, line: str):
         if line == '&&':
             self.state = AFOSMessageParserState.TAGS
-        elif self.timestamp is None:
+            return
-            match = RE_DATE.match(line)
 
-            if match is not None:
+        if self.timestamp is not None:
-                tzoffset = TIMEZONES[match['tz'].upper()]
+            return
 
-                self.timestamp = datetime.datetime(
+        match = RE_DATE.match(line)
-                    year   = int(match['year']),
+
-                    month  = MONTHS[match['month'].upper()],
+        if match is not None:
-                    day    = int(match['day']),
+            tzoffset = TIMEZONES[match['tz'].upper()]
-                    hour   = int(match['hour']),
+            tzinfo   = datetime.timezone(datetime.timedelta(hours=tzoffset))
-                    minute = int(match['minute']),
+
-                    second = 0,
+            self.timestamp = datetime.datetime(
-                    tzinfo = datetime.timezone(datetime.timedelta(hours=tzoffset))
+                year   = int(match['year']),
-                ).astimezone(datetime.UTC)
+                month  = MONTHS[match['month'].upper()],
+                day    = int(match['day']),
+                hour   = int(match['hour']),
+                minute = int(match['minute']),
+                second = 0,
+                tzinfo = tzinfo
+            ).astimezone(datetime.UTC)
 
     def parse_tags(self, line: str):
         if line == '$$':