Restore refresh spinner fix

Fixes #30912

Reverts #31024 which was not shown to fix the issue

Author: swrobel

React/Views/RefreshControl/RCTRefreshControl.m

@@ -41,6 +41,11 @@ - (void)layoutSubviews
 {
   [super layoutSubviews];
 
+  // Fix for bug #7976
+  if (self.backgroundColor == nil) {
+    self.backgroundColor = [UIColor clearColor];
+  }
+  
   // If the control is refreshing when mounted we need to call
   // beginRefreshing in layoutSubview or it doesn't work.
   if (_currentRefreshingState && _isInitialRender) {
@@ -49,18 +54,6 @@ - (void)layoutSubviews
   _isInitialRender = false;
 }
 
-- (void)didMoveToWindow
-{
-  [super didMoveToWindow];
-
-  // Since iOS 14 there seems to be a bug where refresh control becomes
-  // visible if the view gets removed from window then added back again.
-  // Calling endRefreshing fixes the layout.
-  if (!_currentRefreshingState) {
-    [super endRefreshing];
-  }
-}
-
 - (void)beginRefreshingProgrammatically
 {
   UInt64 beginRefreshingTimestamp = _currentRefreshingStateTimestamp;