Remove use of flatten where possible (#9325)

* remove use of flatten where possible

* restore flatten where it says it's needed

* missing utils alpha

src/components/dms/EmojiReactionPicker.web.tsx

@@ -134,12 +134,12 @@ function MenuInner({
             accessibilityRole="button"
             role="button"
             onPress={() => setExpanded(true)}
-            style={flatten([
+            style={[
               a.rounded_full,
               {height: 34, width: 34},
               a.justify_center,
               a.align_center,
-            ])}>
+            ]}>
             <DotGridIcon size="lg" style={t.atoms.text_contrast_medium} />
           </Pressable>
         </DropdownMenu.Item>

src/components/dms/ReportDialog.tsx

@@ -424,7 +424,7 @@ function PreviewMessage({message}: {message: ChatBskyConvoDefs.MessageView}) {
         ]}>
         <RichText
           value={rt}
-          style={[a.text_md, a.leading_snug]}
+          style={[a.text_md]}
           interactiveStyle={a.underline}
           enableTags
         />