merge: withdraw the iron-core beta qualifier

Beta is by definition a plasma quantity, and beta as a prefix for a geometric
angle was already tried and retired here: beta_angle_of_ferritic_element and
beta_angle_of_passive_loop are both superseded in favour of tilt_angle and
vertical_angle spellings.

No shipped name used the token, so the removal is clean.

Author: Simon-McIntosh

imas_standard_names/grammar/model_types.py

@@ -248,7 +248,6 @@ class Qualifier(StrEnum):
     ENHANCEMENT = "enhancement"
     REQUESTED = "requested"
     EJIMA = "ejima"
-    BETA_INCLINATION = "beta_inclination"
     MHD = "mhd"
     WAVE = "wave"
     FAST_WAVE = "fast_wave"

imas_standard_names/grammar/vocabularies/qualifier_categories.yml

@@ -39,7 +39,6 @@ qualifier_categories:
 
   # Geometric, directional, and tensor qualifiers
   geometry:
-    - beta_inclination
     - contravariant
     - covariant
     - cross_field

imas_standard_names/grammar/vocabularies/qualifiers.yml

@@ -208,7 +208,6 @@
 
 # --- Named parameters ---
 - ejima                         # Ejima (volt-second consumption coefficient)
-- beta_inclination              # beta angle of an oblique iron-core segment
 
 # --- Physics regime / type ---
 # NOTE: 'internal' removed — internal_inductance and internal_energy are now

tests/test_vocabulary_gap_tokens.py

@@ -1,6 +1,6 @@
 """Closed-vocabulary coverage for DD-backed quantity families.
 
-Three accepted additions are intentionally additive, while the strain-gauge
+Two accepted additions are intentionally additive, while the strain-gauge
 candidate is rejected on positive evidence:
 
 * Rejected: ``measurement_direction_unit_vector``. Accepted alternatives:
@@ -21,16 +21,10 @@
 * ``relative_humidity`` is the dimensionless fraction of humidity from zero to
   one measured at the X-ray detector, as documented for
   ``camera_x_rays/detector_humidity`` (unit ``1``).
-* ``beta_inclination`` qualifies ``angle`` for the beta-labelled second
-  inclination of an oblique iron-core segment. DD documents counter-clockwise
-  inclination from upward ``grad Z``; its unit history corrects ``m`` to
-  ``rad``. The corresponding sibling pattern is ``alpha_inclination``.
-
 The shipped catalog snapshot contains none of the representative identities for
-the three accepted additions or an equivalent token in those families.
+the two accepted additions or an equivalent token in those families.
 Unindexed ``stokes_parameter`` erases which polarization coordinate is stored;
-generic fractions do not say relative humidity; and bare ``beta`` denotes
-normalized plasma pressure rather than an iron-core geometric inclination.
+generic fractions do not say relative humidity.
 """
 
 from dataclasses import replace
@@ -44,7 +38,6 @@
 @pytest.mark.parametrize(
     ("registry", "tokens"),
     [
-        ("qualifiers", {"beta_inclination"}),
         ("component_axes", {"s0", "s1", "s2", "s3"}),
         ("bases", {"relative_humidity"}),
     ],
@@ -54,11 +47,6 @@ def test_dd_backed_tokens_are_registered(registry: str, tokens: set[str]) -> Non
     assert tokens <= getattr(vocabularies, registry)
 
 
-def test_beta_inclination_joins_the_geometry_qualifier_family() -> None:
-    vocabularies = load_default_vocabularies()
-    assert vocabularies.qualifier_categories["beta_inclination"] == "geometry"
-
-
 @pytest.mark.parametrize(
     "name",
     [
@@ -67,7 +55,6 @@ def test_beta_inclination_joins_the_geometry_qualifier_family() -> None:
         "s2_stokes_parameter_of_fiber_optic_current_sensor",
         "s3_stokes_parameter_of_fiber_optic_current_sensor",
         "relative_humidity_of_detector",
-        "beta_inclination_angle_of_iron_core_segment",
     ],
 )
 def test_dd_backed_vocabulary_name_round_trips_through_render(name: str) -> None:
@@ -78,11 +65,6 @@ def test_dd_backed_vocabulary_name_round_trips_through_render(name: str) -> None
 @pytest.mark.parametrize(
     ("registry", "token", "name"),
     [
-        (
-            "qualifiers",
-            "beta_inclination",
-            "beta_inclination_angle_of_iron_core_segment",
-        ),
         (
             "component_axes",
             "s0",