diff --git a/CHANGELOG.md b/CHANGELOG.md
index 284a6b7f01..08982eb374 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -62,6 +62,9 @@ See also our [versioning policy](https://amici.readthedocs.io/en/latest/versioni
     modules.
   * The `force_compile` argument to `import_petab_problem` has been removed.
     See the `compile_` argument.
+* Removals without deprecation:
+  * `amici.sbml_import.species_to_parameters` has been removed.
+
 
 **Features**
 
diff --git a/python/sdist/amici/importers/petab/v1/sbml_import.py b/python/sdist/amici/importers/petab/v1/sbml_import.py
index f0e57ed9a0..8a9e932285 100644
--- a/python/sdist/amici/importers/petab/v1/sbml_import.py
+++ b/python/sdist/amici/importers/petab/v1/sbml_import.py
@@ -1,5 +1,4 @@
 import logging
-import math
 import os
 import re
 from _collections import OrderedDict
@@ -433,72 +432,6 @@ def show_model_info(sbml_model: "libsbml.Model"):
     logger.info(f"Reactions: {len(sbml_model.getListOfReactions())}")
 
 
-# TODO - remove?!
-def species_to_parameters(
-    species_ids: list[str], sbml_model: "libsbml.Model"
-) -> list[str]:
-    """
-    Turn a SBML species into parameters and replace species references
-    inside the model instance.
-
-    :param species_ids:
-        list of SBML species ID to convert to parameters with the same ID as
-        the replaced species.
-
-    :param sbml_model:
-        SBML model to modify
-
-    :return:
-        list of IDs of species which have been converted to parameters
-    """
-    transformables = []
-
-    for species_id in species_ids:
-        species = sbml_model.getSpecies(species_id)
-
-        if species.getHasOnlySubstanceUnits():
-            logger.warning(
-                f"Ignoring {species.getId()} which has only substance units."
-                " Conversion not yet implemented."
-            )
-            continue
-
-        if math.isnan(species.getInitialConcentration()):
-            logger.warning(
-                f"Ignoring {species.getId()} which has no initial "
-                "concentration. Amount conversion not yet implemented."
-            )
-            continue
-
-        transformables.append(species_id)
-
-    # Must not remove species while iterating over getListOfSpecies()
-    for species_id in transformables:
-        species = sbml_model.removeSpecies(species_id)
-        par = sbml_model.createParameter()
-        par.setId(species.getId())
-        par.setName(species.getName())
-        par.setConstant(True)
-        par.setValue(species.getInitialConcentration())
-        par.setUnits(species.getUnits())
-
-    # Remove from reactants and products
-    for reaction in sbml_model.getListOfReactions():
-        for species_id in transformables:
-            # loop, since removeX only removes one instance
-            while reaction.removeReactant(species_id):
-                # remove from reactants
-                pass
-            while reaction.removeProduct(species_id):
-                # remove from products
-                pass
-            while reaction.removeModifier(species_id):
-                # remove from modifiers
-                pass
-
-    return transformables
-
-
 def _add_global_parameter(
     sbml_model: libsbml.Model,
     parameter_id: str,