fix(rn,sdk) drop deprecated option enableWelcomePage

It got replaced by a feature flag.

android/app/src/main/java/org/jitsi/meet/MainActivity.java

         // Set default options
         JitsiMeetConferenceOptions defaultOptions
             = new JitsiMeetConferenceOptions.Builder()
-            .setWelcomePageEnabled(true)
             .setServerURL(buildURL(defaultURL))
+            .setFeatureFlag("welcomepage.enabled", true)
             .setFeatureFlag("call-integration.enabled", false)
             .setFeatureFlag("resolution", 360)
             .setFeatureFlag("server-url-change.enabled", !configurationByRestrictions)

android/sdk/src/main/java/org/jitsi/meet/sdk/JitsiMeetConferenceOptions.java

             return this;
         }
 
-        /**
-         * Sets the welcome page enabled / disabled. The welcome page lists recent meetings and
-         * calendar appointments and it's meant to be used by standalone applications. Defaults to
-         * false.
-         * @param enabled - Whether the welcome page should be enabled or not.
-         * @return - The {@link Builder} object itself so the method calls can be chained.
-         */
-        public Builder setWelcomePageEnabled(boolean enabled) {
-            this.featureFlags.putBoolean("welcomepage.enabled", enabled);
-
-            return this;
-        }
-
         public Builder setFeatureFlag(String flag, boolean value) {
             this.featureFlags.putBoolean(flag, value);
 

ios/app/src/AppDelegate.m

     jitsiMeet.universalLinkDomains = @[@"meet.jit.si", @"alpha.jitsi.net", @"beta.meet.jit.si"];
 
     jitsiMeet.defaultConferenceOptions = [JitsiMeetConferenceOptions fromBuilder:^(JitsiMeetConferenceOptionsBuilder *builder) {
+        [builder setFeatureFlag:@"welcomepage.enabled" withBoolean:YES];
         [builder setFeatureFlag:@"resolution" withValue:@(360)];
         [builder setFeatureFlag:@"ios.screensharing.enabled" withBoolean:YES];
         builder.serverURL = [NSURL URLWithString:@"https://meet.jit.si"];
-        builder.welcomePageEnabled = YES;
 
         // Apple rejected our app because they claim requiring a
         // Dropbox account for recording is not acceptable.

ios/sdk/src/JitsiMeetConferenceOptions.h

 
 @property (nonatomic, readonly, nonnull) NSDictionary *config;
 
-/**
- * Set to YES to enable the welcome page. Typically SDK users won't need this enabled
- * since the host application decides which meeting to join.
- */
-@property (nonatomic) BOOL welcomePageEnabled;
-
 /**
  * Information about the local user. It will be used in absence of a token.
  */
 
 @property (nonatomic, readonly, nonnull) NSDictionary *featureFlags;
 
-@property (nonatomic, readonly) BOOL welcomePageEnabled;
-
 @property (nonatomic, nullable) JitsiMeetUserInfo *userInfo;
 
 + (instancetype _Nonnull)fromBuilder:(void (^_Nonnull)(JitsiMeetConferenceOptionsBuilder *_Nonnull))initBlock;

ios/sdk/src/JitsiMeetConferenceOptions.m

 #import "JitsiMeetConferenceOptions+Private.h"
 #import "JitsiMeetUserInfo+Private.h"
 
-/**
- * Backwards compatibility: turn the boolean property into a feature flag.
- */
-static NSString *const WelcomePageEnabledFeatureFlag = @"welcomepage.enabled";
-
-
 @implementation JitsiMeetConferenceOptionsBuilder {
     NSMutableDictionary *_featureFlags;
     NSMutableDictionary *_config;
 }
 
-@dynamic welcomePageEnabled;
-
 - (instancetype)init {
     if (self = [super init]) {
         _serverURL = nil;
     _config[config] = value;
 }
 
-#pragma mark - Dynamic properties
-
-- (void)setWelcomePageEnabled:(BOOL)welcomePageEnabled {
-    [self setFeatureFlag:WelcomePageEnabledFeatureFlag
-               withBoolean:welcomePageEnabled];
-}
-
-- (BOOL)welcomePageEnabled {
-    NSNumber *n = _featureFlags[WelcomePageEnabledFeatureFlag];
-
-    return n != nil ? [n boolValue] : NO;
-}
-
 @end
 
 @implementation JitsiMeetConferenceOptions {
     NSDictionary *_config;
 }
 
-@dynamic welcomePageEnabled;
-
-#pragma mark - Dynamic properties
-
-- (BOOL)welcomePageEnabled {
-    NSNumber *n = _featureFlags[WelcomePageEnabledFeatureFlag];
-
-    return n != nil ? [n boolValue] : NO;
-}
-
 #pragma mark - Internal initializer
 
 - (instancetype)initWithBuilder:(JitsiMeetConferenceOptionsBuilder *)builder {