tests/legacy_api/test_server.py(refactor): Remove pre-3.2 version conditional

why: tmux >= 3.2a is now required, making the conditional always true
what:
- Remove has_gte_version("3.2") check in test_new_session_shell
- Remove unused has_gte_version import

Author: tony

tests/legacy_api/test_server.py

@@ -8,7 +8,6 @@
 
 import pytest
 
-from libtmux.common import has_gte_version
 from libtmux.server import Server
 
 if t.TYPE_CHECKING:
@@ -130,10 +129,7 @@ def test_new_session_shell(server: Server) -> None:
     pane_start_command = pane.get("pane_start_command")
     assert pane_start_command is not None
 
-    if has_gte_version("3.2"):
-        assert pane_start_command.replace('"', "") == cmd
-    else:
-        assert pane_start_command == cmd
+    assert pane_start_command.replace('"', "") == cmd
 
 
 def test_no_server_sessions() -> None: