Revert "tests: Run composefs oci pull test on composefs systems"

This reverts commit 93e9c3126c6bd9b14e46e69ddb21b047cd7b73a6.

The test fails when running on composefs systems. Need to investigate
the actual failure before enabling this test.

Assisted-by: Claude Code (Sonnet 4.5)

Author: cgwalters

tmt/tests/booted/readonly/030-test-composefs.nu

@@ -7,14 +7,16 @@ tap begin "composefs integration smoke test"
 let st = bootc status --json | from json
 let is_composefs = ($st.status.booted.composefs? != null)
 
-if not $is_composefs {
+if $is_composefs {
+    # When already on composefs, we can only test read-only operations
+    print "# TODO composefs: skipping pull test - cfs oci pull requires write access to sysroot"
+    bootc internals cfs --help
+} else {
     # When not on composefs, run the full test including initialization
     bootc internals test-composefs
+    bootc internals cfs --help
+    bootc internals cfs oci pull docker://busybox busybox
+    test -L /sysroot/composefs/streams/refs/busybox
 }
 
-# These tests work on both composefs and non-composefs systems
-bootc internals cfs --help
-bootc internals cfs oci pull docker://busybox busybox
-test -L /sysroot/composefs/streams/refs/busybox
-
 tap ok