Remove TextInput setting insertionPointColor

We should not be setting the insertionPointColor by default.
Let the OS do its thing. Later we can consider exposing a prop for this but the default should be to not set it.

Author: lyahdav

Libraries/Text/TextInput/Multiline/RCTUITextView.m

@@ -46,7 +46,6 @@ - (instancetype)initWithFrame:(CGRect)frame
     _placeholderView.numberOfLines = 0;
     [self addSubview:_placeholderView];
 #else // [TODO(macOS GH#774)
-    self.insertionPointColor = [NSColor selectedControlColor];
     // Fix blurry text on non-retina displays.
     self.canDrawSubviewsIntoLayer = YES;
     self.allowsUndo = YES;
@@ -131,7 +130,7 @@ - (void)setSelectionColor:(RCTUIColor *)selectionColor
   NSMutableDictionary *selectTextAttributes = self.selectedTextAttributes.mutableCopy;
   selectTextAttributes[NSBackgroundColorAttributeName] = selectionColor ?: [NSColor selectedControlColor];
   self.selectedTextAttributes = selectTextAttributes.copy;
-  self.insertionPointColor = self.selectionColor ?: [NSColor selectedControlColor];
+  self.insertionPointColor = self.selectionColor ?: [NSColor textColor];
 }
 
 - (RCTUIColor*)selectionColor

Libraries/Text/TextInput/Singleline/RCTUITextField.m

@@ -77,7 +77,6 @@ - (NSText *)setUpFieldEditorAttributes:(NSText *)textObj
   NSMutableDictionary *selectTextAttributes = fieldEditor.selectedTextAttributes.mutableCopy;
   selectTextAttributes[NSBackgroundColorAttributeName] = self.selectionColor ?: [NSColor selectedControlColor];
 	fieldEditor.selectedTextAttributes = selectTextAttributes;
-  fieldEditor.insertionPointColor = self.selectionColor ?: [RCTUIColor selectedControlColor];
   return fieldEditor;
 }