Revert "Add deprecation warning to inject (#854)"

This reverts commit 0f8989e.

src/dodal/common/coordination.py

@@ -1,6 +1,4 @@
 import uuid
-import warnings
-from textwrap import dedent
 from typing import Any
 
 from dodal.common.types import Group
@@ -39,22 +37,4 @@ def scan(x: Movable = inject("stage_x"), start: float = 0.0 ...)
 
     """
 
-    warnings.warn(
-        dedent("""
-        Inject is deprecated, users are now expected to call the device factory
-        functions in dodal directly, these will cache devices as singletons after
-        they have been called once. For example:
-
-        from bluesky.protocols import Readable
-        from bluesky.utils import MsgGenerator
-        from dodal.beamlines import i22
-
-        def my_plan(detector: Readable = i22.saxs(connect_immediately=False)) -> MsgGenerator:
-            ...
-
-        Where previously the default would have been inject("saxs")
-        """),
-        DeprecationWarning,
-        stacklevel=2,
-    )
     return name

tests/common/test_coordination.py

@@ -16,12 +16,6 @@ def test_group_uid(group: str):
     assert not gid.endswith(f"{group}-")
 
 
-@pytest.mark.filterwarnings("ignore::DeprecationWarning")
-def test_inject_returns_value():
-    assert inject("foo") == "foo"
-
-
-@pytest.mark.filterwarnings("ignore::DeprecationWarning")
 def test_type_checking_ignores_inject():
     def example_function(x: Movable = inject("foo")) -> MsgGenerator:  # noqa: B008
         yield from {}
@@ -31,13 +25,3 @@ def example_function(x: Movable = inject("foo")) -> MsgGenerator:  # noqa: B008
     x: Parameter = signature(example_function).parameters["x"]
     assert x.annotation == Movable
     assert x.default == "foo"
-
-
-def test_inject_is_deprecated():
-    with pytest.raises(
-        DeprecationWarning,
-        match="Inject is deprecated, users are now expected to call the device factory",
-    ):
-
-        def example_function(x: Movable = inject("foo")) -> MsgGenerator:  # noqa: B008
-            yield from {}