Remove Picker from OSS (#31772)

Summary:
Pull Request resolved: #31772

Changelog:[General][Removed] - Remove Picker iOS code

Reviewed By: p-sun

Differential Revision: D29124724

fbshipit-source-id: d3b3a409961cf04e2cd079a91986d30e3166dcda

Author: Luna Wei

React/Fabric/Mounting/ComponentViews/Picker/RCTPickerComponentView.h

@@ -35,7 +35,6 @@ Class<RCTComponentViewProtocol> RCTPullToRefreshViewCls(void) __attribute__((use
 Class<RCTComponentViewProtocol> RCTActivityIndicatorViewCls(void) __attribute__((used));
 Class<RCTComponentViewProtocol> RCTSliderCls(void) __attribute__((used));
 Class<RCTComponentViewProtocol> RCTSwitchCls(void) __attribute__((used));
-Class<RCTComponentViewProtocol> RCTPickerCls(void) __attribute__((used));
 Class<RCTComponentViewProtocol> RCTUnimplementedNativeViewCls(void) __attribute__((used));
 Class<RCTComponentViewProtocol> RCTParagraphCls(void) __attribute__((used));
 Class<RCTComponentViewProtocol> RCTTextInputCls(void) __attribute__((used));

React/Fabric/Mounting/ComponentViews/Picker/RCTPickerComponentView.mm

@@ -24,7 +24,6 @@
     {"ActivityIndicatorView", RCTActivityIndicatorViewCls},
     {"Slider", RCTSliderCls},
     {"Switch", RCTSwitchCls},
-    {"Picker", RCTPickerCls},
     {"UnimplementedNativeView", RCTUnimplementedNativeViewCls},
     {"Paragraph", RCTParagraphCls},
     {"TextInput", RCTTextInputCls},