[ios] Review fixes

Signed-off-by: Kiryl Kaveryn <kirylkaveryn@gmail.com>

iphone/CoreApi/CoreApi/PlacePageData/Common/PlacePagePreviewData.mm

@@ -53,7 +53,6 @@ static PlacePageDataSchedule convertOpeningHours(std::string_view rawOH)
 - (instancetype)initWithTrackInfo:(TrackInfo * _Nonnull)trackInfo {
   self = [super init];
   if (self) {
-    // TODO: (KK) Replace separator with a shared static constant.
     NSString * kSeparator = @" • ";
     _title = [@[trackInfo.duration, trackInfo.distance] componentsJoinedByString:kSeparator];
   }

iphone/CoreApi/CoreApi/PlacePageData/ElevationProfile/ElevationProfileData.mm

@@ -59,7 +59,7 @@ static ElevationDifficulty convertDifficulty(uint8_t difficulty) {
                                                                                   andAltitude:point.m_point.GetAltitude()];
     [pointsArray addObject:elevationPoint];
   }
-  return [pointsArray copy];
+  return pointsArray;
 }
 
 @end