diff --git a/packages/ui/report.api.md b/packages/ui/report.api.md
index 237fd655cd..0533128712 100644
--- a/packages/ui/report.api.md
+++ b/packages/ui/report.api.md
@@ -774,9 +774,6 @@ export interface CheckboxProps
   extends Omit<CheckboxProps_2, 'children' | 'className'>,
     CheckboxOwnProps {}
 
-// @public
-export type ClassNamesMap = Record<string, string>;
-
 // @public (undocumented)
 export const Column: (props: ColumnProps) => JSX_2.Element;
 
@@ -833,16 +830,6 @@ export type Columns =
   | '12'
   | 'auto';
 
-// @public
-export interface ComponentDefinition {
-  // (undocumented)
-  classNames: ClassNamesMap;
-  // (undocumented)
-  dataAttributes?: DataAttributesMap;
-  // (undocumented)
-  utilityProps?: string[];
-}
-
 // @public (undocumented)
 export const Container: ForwardRefExoticComponent<
   ContainerProps & RefAttributes<HTMLDivElement>
@@ -932,12 +919,6 @@ export interface CursorResponse<T> {
   totalCount?: number;
 }
 
-// @public
-export type DataAttributesMap = Record<string, DataAttributeValues>;
-
-// @public
-export type DataAttributeValues = readonly (string | number | boolean)[];
-
 // @public (undocumented)
 export const Dialog: ForwardRefExoticComponent<
   DialogProps & RefAttributes<HTMLDivElement>
diff --git a/packages/ui/src/hooks/useStyles.ts b/packages/ui/src/hooks/useStyles.ts
deleted file mode 100644
index 7bb25be651..0000000000
--- a/packages/ui/src/hooks/useStyles.ts
+++ /dev/null
@@ -1,111 +0,0 @@
-/*
- * Copyright 2025 The Backstage Authors
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-import { useBreakpoint } from './useBreakpoint';
-import type { ComponentDefinition } from '../types';
-import {
-  resolveResponsiveValue,
-  processUtilityProps,
-} from './useDefinition/helpers';
-
-/**
- * React hook to get class names and data attributes for a component with responsive support
- * @param componentDefinition - The component's definition object
- * @param props - All component props
- * @returns Object with classNames, dataAttributes, utilityClasses, style, and cleanedProps
- */
-export function useStyles<
-  T extends ComponentDefinition,
-  P extends Record<string, any> = Record<string, any>,
->(
-  componentDefinition: T,
-  props: P = {} as P,
-): {
-  classNames: T['classNames'];
-  dataAttributes: Record<string, string>;
-  utilityClasses: string;
-  style: React.CSSProperties;
-  cleanedProps: P;
-} {
-  const { breakpoint } = useBreakpoint();
-  const classNames = componentDefinition.classNames;
-  const utilityPropNames =
-    ('utilityProps' in componentDefinition
-      ? componentDefinition.utilityProps
-      : []) || [];
-
-  // Extract data attribute names from component definition
-  const dataAttributeNames =
-    'dataAttributes' in componentDefinition
-      ? Object.keys(componentDefinition.dataAttributes || {})
-      : [];
-
-  // Extract existing style from props
-  const incomingStyle = props.style || {};
-
-  // Generate data attributes from component definition
-  const dataAttributes: Record<string, string> = {};
-  for (const key of dataAttributeNames) {
-    const value = props[key];
-    if (value !== undefined && value !== null) {
-      // Handle boolean and number values directly
-      if (typeof value === 'boolean' || typeof value === 'number') {
-        dataAttributes[`data-${key}`] = String(value);
-      } else {
-        const resolvedValue = resolveResponsiveValue(value, breakpoint);
-        if (resolvedValue !== undefined) {
-          dataAttributes[`data-${key}`] = resolvedValue;
-        }
-      }
-    }
-  }
-
-  // Generate utility classes and custom styles from component's allowed utility props
-  const { utilityClasses, utilityStyle: generatedStyle } = processUtilityProps(
-    props,
-    utilityPropNames,
-  );
-
-  // Create cleaned props by excluding only utility props
-  // All other props (including data attributes, style, children, etc.) remain
-  const utilityPropsSet = new Set<string>(utilityPropNames);
-
-  const cleanedPropsBase = Object.keys(props).reduce((acc, key) => {
-    if (!utilityPropsSet.has(key)) {
-      acc[key] = props[key];
-    }
-    return acc;
-  }, {} as any);
-
-  // Merge incoming style with generated styles (incoming styles take precedence)
-  const mergedStyle = {
-    ...generatedStyle,
-    ...incomingStyle,
-  };
-
-  // Add merged style to cleanedProps
-  const cleanedProps = {
-    ...cleanedPropsBase,
-    style: mergedStyle,
-  } as P;
-
-  return {
-    classNames,
-    dataAttributes,
-    utilityClasses,
-    style: mergedStyle,
-    cleanedProps,
-  };
-}
diff --git a/packages/ui/src/types.ts b/packages/ui/src/types.ts
index af87bfb20b..7a302e1694 100644
--- a/packages/ui/src/types.ts
+++ b/packages/ui/src/types.ts
@@ -153,36 +153,9 @@ export interface UtilityProps extends SpaceProps {
   rowSpan?: Responsive<Columns | 'full'>;
 }
 
-/**
- * Base type for the component styles structure
- * @public
- */
-export type ClassNamesMap = Record<string, string>;
-
-/**
- * Base type for the component styles structure
- * @public
- */
-export type DataAttributeValues = readonly (string | number | boolean)[];
-
-/**
- * Base type for the component styles structure
- * @public
- */
-export type DataAttributesMap = Record<string, DataAttributeValues>;
-
-/**
- * Base type for the component styles structure
- * @public
- */
-export interface ComponentDefinition {
-  classNames: ClassNamesMap;
-  dataAttributes?: DataAttributesMap;
-  utilityProps?: string[];
-}
-
 /**
  * Resolved background level stored in context and applied as `data-bg` on DOM elements.
+ * Background type for the neutral bg system.
  *
  * Supports neutral levels ('neutral-1' through 'neutral-3') and
  * intent backgrounds ('danger', 'warning', 'success').