Revert "ANDROID: BUILD.bazel: Add Image.zst build artifact"

Revert submission 3855549-zst_image_compression

Reason for revert: Breaks 6.18 builders

Reverted changes: /q/submissionid:3855549-zst_image_compression

Change-Id: I75c46a577a18f830bee2b0828ac099fd605d6885
Signed-off-by: Hubert Mazur <hmazur@google.com>

BUILD.bazel

@@ -53,7 +53,6 @@ _GKI_AARCH64_MAKE_GOALS = [
     "Image.lz4",
     "Image.gz",
     "Image.lzma",
-    "Image.zst",
     "modules",
 ]
 
@@ -67,7 +66,6 @@ _GKI_AARCH64_BOOT_IMAGE_SIZES = {
     "lz4": "53477376",
     "gz": "47185920",
     "lzma": "47185920",
-    "zst": "33554432",
 }
 
 _GKI_X86_64_BOOT_IMAGE_SIZES = {