docs: drop static iOS/tvOS/macOS badges, SPI now shows platforms

The Swift Package Index Platforms badge populated correctly after 2.0.0 was indexed, so the static minimum-version platform badges are now redundant. Minimum versions still live in the Requirements table further down. Static Swift 6.0+ badge stays since it communicates the minimum required toolchain (different info from SPI's 'built against' Swift versions badge).

Author: Vincent Herbst

README.md

@@ -11,9 +11,6 @@
   <a href="https://github.com/superuser404notfound/AetherEngine/actions/workflows/ci.yml"><img src="https://github.com/superuser404notfound/AetherEngine/actions/workflows/ci.yml/badge.svg"></a>
   <a href="https://swiftpackageindex.com/superuser404notfound/AetherEngine"><img src="https://img.shields.io/endpoint?url=https%3A%2F%2Fswiftpackageindex.com%2Fapi%2Fpackages%2Fsuperuser404notfound%2FAetherEngine%2Fbadge%3Ftype%3Dswift-versions"></a>
   <a href="https://swiftpackageindex.com/superuser404notfound/AetherEngine"><img src="https://img.shields.io/endpoint?url=https%3A%2F%2Fswiftpackageindex.com%2Fapi%2Fpackages%2Fsuperuser404notfound%2FAetherEngine%2Fbadge%3Ftype%3Dplatforms"></a>
-  <img src="https://img.shields.io/badge/iOS-16%2B-black?logo=apple">
-  <img src="https://img.shields.io/badge/tvOS-16%2B-black?logo=apple">
-  <img src="https://img.shields.io/badge/macOS-14%2B-black?logo=apple">
   <img src="https://img.shields.io/badge/Swift-6.0%2B-F05138?logo=swift&logoColor=white">
   <img src="https://img.shields.io/badge/license-LGPL--3.0%20%2B%20App%20Store%20Exception-lightgrey">
   <a href="https://ko-fi.com/superuser404"><img src="https://img.shields.io/badge/Ko--fi-Support-FF5E5B?logo=kofi&logoColor=white"></a>