Revert "[avb_footer] Include initrd_* hashes as hash descriptors..."

Revert submission 2375848-initrd_avb_footer

Reason for revert: build break

Reverted changes: /q/submissionid:2375848-initrd_avb_footer
Bug: 264940248
Change-Id: I44081c54a648936273cbb9d3c4c5046361eb2c4d
diff --git a/microdroid/initrd/Android.bp b/microdroid/initrd/Android.bp
index 4531583..d05ea86 100644
--- a/microdroid/initrd/Android.bp
+++ b/microdroid/initrd/Android.bp
@@ -122,3 +122,28 @@
     },
     filename: "microdroid_initrd_normal.img",
 }
+
+genrule {
+    name: "microdroid_initrd_normal.sha256",
+    srcs: [":microdroid_initrd_normal"],
+    cmd: "cat $(in) | sha256sum | cut -d' ' -f1 > $(out)",
+    out: ["hash"],
+}
+
+genrule {
+    name: "microdroid_initrd_debuggable.sha256",
+    srcs: [":microdroid_initrd_debuggable"],
+    cmd: "cat $(in) | sha256sum | cut -d' ' -f1 > $(out)",
+    out: ["hash"],
+}
+
+genrule {
+    name: "microdroid_initrd_hashes",
+    srcs: [
+        ":microdroid_initrd_normal.sha256",
+        ":microdroid_initrd_debuggable.sha256",
+    ],
+    // join the hashes with commas
+    cmd: "cat $(in) | tr '\n' ',' > $(out) && truncate -s -1 $(out)",
+    out: ["output"],
+}