Removed meta_keywords

CHANGELOG.rst

@@ -96,7 +96,7 @@ Breaking Changes
 Deprecations
 ------------
 
-- Using `sunpy.map.header_helper.meta_keywords` is deprecated.
+- Using ``sunpy.map.header_helper.meta_keywords`` is deprecated.
   Please see :ref:`Meta Keywords Table` for the list of metadata keywords used by `~sunpy.map.Map`. (`#6743 <https://github.com/sunpy/sunpy/pull/6743>`__)
 - The utility function ``sunpy.map.extract_along_coord`` is deprecated.
   Use :func:`sunpy.map.pixelate_coord_path`, and then pass its output to :func:`sunpy.map.sample_at_coords`. (`#6840 <https://github.com/sunpy/sunpy/pull/6840>`__)

changelog/7337.removal.rst

@@ -0,0 +1 @@
+``sunpy.map.header_helper.meta_keywords`` has been removed.

docs/how_to/create_custom_map.rst

@@ -101,7 +101,7 @@ Here's another example of passing ``reference_pixel`` and ``scale`` to the funct
     rsun_obs: 965.3829548285768
 
 As we can see, a list of WCS and observer meta information is contained within the generated headers, however we may want to include other meta information including the observatory name, the wavelength and wavelength unit of the observation.
-Any of the keywords in the dictionary returned by :func:`~sunpy.map.header_helper.meta_keywords` can be passed to the :func:`~sunpy.map.header_helper.make_fitswcs_header` and will then populate the returned MetaDict header.
+Any valid FITS WCS keywords can be passed to the :func:`~sunpy.map.header_helper.make_fitswcs_header` and will then populate the returned MetaDict header.
 Furthermore, the following observation keywords can be passed to the `~sunpy.map.header_helper.make_fitswcs_header` function: ``observatory``, ``instrument``, ``telescope``, ``wavelength``, ``exposure``.
 
 An example of creating a header with these additional keywords:

docs/reference/map.rst

@@ -70,7 +70,6 @@ All sunpy Maps are derived from `sunpy.map.GenericMap`, all the methods and attr
     :inherited-members:
     :include-all-objects:
     :skip: make_fitswcs_header
-    :skip: meta_keywords
     :skip: get_observer_meta
     :skip: make_heliographic_header
 

sunpy/map/header_helper.py

@@ -7,26 +7,8 @@
 from sunpy import log
 from sunpy.coordinates import frames, sun
 from sunpy.util import MetaDict
-from sunpy.util.decorators import deprecated
 
-__all__ = ['meta_keywords', 'make_fitswcs_header', 'get_observer_meta', 'make_heliographic_header']
-
-
-@deprecated(since="5.0", message="Unused and will be removed in 6.0")
-def meta_keywords():
-    """
-    Returns the metadata keywords that are used when creating a `sunpy.map.GenericMap`.
-
-    Examples
-    --------
-    Returns a dictionary of all meta keywords that are used in a `sunpy.map.GenericMap` header:
-        >>> import sunpy.map
-        >>> sunpy.map.meta_keywords() # doctest: +SKIP
-        {'cunit1': 'Units of the coordinate increments along naxis1 e.g. arcsec **required',
-         'cunit2': 'Units of the coordinate increments along naxis2 e.g. arcsec **required',
-         ...
-    """
-    return _map_meta_keywords.copy()
+__all__ = ['make_fitswcs_header', 'get_observer_meta', 'make_heliographic_header']
 
 
 @u.quantity_input(equivalencies=u.spectral())

sunpy/map/tests/test_header_helper.py

@@ -9,7 +9,6 @@
 from sunpy.coordinates import frames, sun
 from sunpy.map import make_fitswcs_header
 from sunpy.map.header_helper import make_heliographic_header
-from sunpy.util.exceptions import SunpyDeprecationWarning
 from sunpy.util.metadata import MetaDict
 
 
@@ -62,12 +61,6 @@ def hpc_coord_notime():
     return SkyCoord(0*u.arcsec, 0*u.arcsec, frame=frames.Helioprojective)
 
 
-def test_metakeywords():
-    with pytest.warns(SunpyDeprecationWarning):
-        meta = sunpy.map.meta_keywords()
-        assert isinstance(meta, dict)
-
-
 def test_scale_conversion(map_data, hpc_coord):
     # The header will have cunit1/2 of arcsec
     header = make_fitswcs_header(map_data, hpc_coord, scale=[1, 2] * u.arcmin / u.pix)