delete hasBridge from root view api (#38870)

Summary:
Pull Request resolved: #38870

## Changelog:

[iOS][Breaking] - hasBridge is removed from RCTRootView and RCTSurfaceHostingProxyRootView

i'm looking to limit callsites to the bridge in new architecture. in GH search i didn't see anyone using this method.

Reviewed By: cipolleschi

Differential Revision: D48175886

fbshipit-source-id: 367bfd549f658a64c5f9defac6eb66b92e681216

Author: philIip

packages/react-native/React/Base/RCTRootView.h

@@ -77,11 +77,6 @@ extern
                 initialProperties:(nullable NSDictionary *)initialProperties
                     launchOptions:(nullable NSDictionary *)launchOptions;
 
-/**
- * This API allows RCTRootView users to know if the root view is backed by the bridge.
- */
-@property (nonatomic, readonly) BOOL hasBridge;
-
 /**
  * This API allows users of RCTRootView to access other NativeModules, without
  * directly accessing the bridge.

packages/react-native/React/Base/RCTRootView.m

@@ -121,11 +121,6 @@ - (UIView *)view
   return self;
 }
 
-- (BOOL)hasBridge
-{
-  return _bridge != nil;
-}
-
 - (RCTModuleRegistry *)moduleRegistry
 {
   return _bridge.moduleRegistry;

packages/react-native/React/Base/Surface/SurfaceHostingView/RCTSurfaceHostingProxyRootView.h

@@ -27,7 +27,6 @@ NS_ASSUME_NONNULL_BEGIN
 
 @property (nonatomic, copy, readonly) NSString *moduleName;
 @property (nonatomic, strong, readonly) RCTBridge *bridge;
-@property (nonatomic, readonly) BOOL hasBridge;
 @property (nonatomic, strong, readonly) RCTModuleRegistry *moduleRegistry;
 @property (nonatomic, strong, readonly) id<RCTEventDispatcherProtocol> eventDispatcher;
 @property (nonatomic, copy, readwrite) NSDictionary *appProperties;

packages/react-native/React/Base/Surface/SurfaceHostingView/RCTSurfaceHostingProxyRootView.mm

@@ -113,11 +113,6 @@ - (instancetype)initWithSurface:(id<RCTSurfaceProtocol>)surface
   return self;
 }
 
-- (BOOL)hasBridge
-{
-  return _bridge != nil;
-}
-
 - (RCTModuleRegistry *)moduleRegistry
 {
   // In bridgeless mode, RCTSurfaceHostingProxyRootView is created with an RCTModuleRegistry