Metal: Cleanup texture caps init

The removed line is redundant as the ASTC texture support
is enabled during the setTextureExtensionSupport call.

Bug: angleproject:6874
Change-Id: Ib9016e4d40acf1f466fa10920384b7419e6fed49
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3404100
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Alexey Knyazev <lexa.knyazev@gmail.com>
diff --git a/src/libANGLE/renderer/metal/DisplayMtl.mm b/src/libANGLE/renderer/metal/DisplayMtl.mm
index 8591ca3..88130a7 100644
--- a/src/libANGLE/renderer/metal/DisplayMtl.mm
+++ b/src/libANGLE/renderer/metal/DisplayMtl.mm
@@ -1017,7 +1017,6 @@
     mNativeExtensions.readDepthNV         = false;
     mNativeExtensions.readStencilNV       = false;
     mNativeExtensions.depthBufferFloat2NV = false;
-    mNativeExtensions.textureCompressionAstcLdrKHR &= supportsAppleGPUFamily(2);
 }
 
 void DisplayMtl::initializeLimitations()