fixup update-android.sh (#2047)

this line got here by accident from another pR

Author: vaind

flutter/scripts/update-android.sh

@@ -20,7 +20,6 @@ get-repo)
 set-version)
     newValue="${BASH_REMATCH[1]}$2"
     echo "${content/${BASH_REMATCH[0]}/$newValue}" >$file
-    ../scripts/generate-android-bindings.sh "$2"
     ;;
 *)
     echo "Unknown argument $1"