[ios] Correctly unsubscribe from notifications

Signed-off-by: Alexander Borsuk <me@alex.bio>

iphone/Maps/Classes/MWMTextView.m

@@ -21,7 +21,7 @@
 }
 
 - (void)dealloc {
-  [NSNotificationCenter.defaultCenter removeObserver:self name:UITextViewTextDidChangeNotification object:nil];
+  [NSNotificationCenter.defaultCenter removeObserver:self];
 }
 
 - (UILabel *)placeholderView {

iphone/Maps/Core/Location/MWMLocationManager.mm

@@ -465,12 +465,7 @@ void setShowLocationAlert(BOOL needShow) {
   } else {
     _started = NO;
     [self stop];
-    [notificationCenter removeObserver:self
-                                  name:UIDeviceOrientationDidChangeNotification
-                                object:nil];
-    [notificationCenter removeObserver:self
-                                  name:UIDeviceBatteryStateDidChangeNotification
-                                object:nil];
+    [notificationCenter removeObserver:self];
   }
 }
 

iphone/Maps/UI/Search/MWMSearchManager+Layout.h

@@ -3,5 +3,6 @@
 @interface MWMSearchManager (Layout)
 
 - (void)layoutTopViews;
+- (void)removeKeyboardObservers;
 
 @end

iphone/Maps/UI/Search/MWMSearchManager+Layout.m

@@ -85,6 +85,10 @@ static CGFloat const changeModeViewOffsetKeyboard = -12;
                                              object:nil];
 }
 
+- (void)removeKeyboardObservers {
+  [[NSNotificationCenter defaultCenter] removeObserver:self];
+}
+
 #pragma mark - keyboard movements
 - (void)keyboardWillShow:(NSNotification *)notification {
   CGSize keyboardSize = [[[notification userInfo] objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue].size;

iphone/Maps/UI/Search/MWMSearchManager.mm

@@ -485,6 +485,7 @@ using Observers = NSHashTable<Observer>;
       [contentView removeFromSuperview];
       [actionBarView removeFromSuperview];
       [searchBarView removeFromSuperview];
+      [self removeKeyboardObservers];
     }];
 }