Remove onMouseDown from SplitView

Author: mischnic

packages/@react-aria/splitview/src/useSplitView.ts

@@ -33,8 +33,6 @@ export function useSplitView(props: SplitViewAriaProps, state: SplitViewState):
     secondaryMaxSize = Infinity,
     orientation = 'horizontal' as 'horizontal',
     allowsResizing = true
-    // TODO this really needs to be renamed!
-    // onMouseDown: propsOnMouseDown
   } = props;
   let {containerState, handleState} = state;
   let id = useId(providedId);

packages/@react-spectrum/splitview/stories/SplitView.stories.js

@@ -134,15 +134,6 @@ storiesOf('SplitView', module)
       </SplitView>
     )
   )
-  .add(
-    'onMouseDown',
-    () => (
-      <SplitView UNSAFE_className={svStyles['storybook-SplitView']} onMouseDown={action('onMouseDown')}>
-        <div>Primary</div>
-        <div>Secondary</div>
-      </SplitView>
-    )
-  )
   .add(
     'with scrolling content',
     () => (

packages/@react-types/shared/src/splitview.d.ts

@@ -12,7 +12,6 @@
 
 import {
   Dispatch,
-  MouseEventHandler,
   MutableRefObject,
   ReactElement,
   SetStateAction
@@ -55,7 +54,6 @@ export interface SplitViewState {
 
 export interface SplitViewAriaProps {
   id?: string,
-  onMouseDown?: MouseEventHandler,
   allowsResizing?: boolean,
   orientation?: Orientation,
   primaryPane?: 0 | 1,