TYP: Remove unnecessary 'from __future__ import annotations' statements (#3386)

Author: seisman

pygmt/src/shift_origin.py

@@ -2,8 +2,6 @@
 shift_origin - Shift plot origin in x and/or y directions.
 """
 
-from __future__ import annotations
-
 from pygmt.clib import Session
 
 

pygmt/src/solar.py

@@ -2,8 +2,6 @@
 solar - Plot day-night terminators and twilight.
 """
 
-from __future__ import annotations
-
 from typing import Literal
 
 import pandas as pd

pygmt/src/timestamp.py

@@ -2,19 +2,13 @@
 timestamp - Plot the GMT timestamp logo.
 """
 
-from __future__ import annotations
-
 import warnings
-from typing import TYPE_CHECKING
+from collections.abc import Sequence
 
 from packaging.version import Version
 from pygmt.clib import Session, __gmt_version__
 from pygmt.helpers import build_arg_list, kwargs_to_strings
 
-if TYPE_CHECKING:
-    from collections.abc import Sequence
-
-
 __doctest_skip__ = ["timestamp"]