Remove system_dlkm from _FRAMEWORK_PARTITIONS

system_dlkm partition is related to GKI, so it should be
in the same category as boot image.

Test: merge_target_files \
        --path otatools \
        --framework-target-files framework-target_files.zip \
	--vendor-target-files vendor-target_files.zip \
	--output-target-files merged-target_files.zip
Bug: 294482075
Change-Id: Ie8f60d72f44d31e1bc3b556735b92ed0a2fda662
diff --git a/tools/releasetools/merge/merge_utils.py b/tools/releasetools/merge/merge_utils.py
index b5683a8..d446fc0 100644
--- a/tools/releasetools/merge/merge_utils.py
+++ b/tools/releasetools/merge/merge_utils.py
@@ -217,7 +217,7 @@
 
 # Partitions that are grabbed from the framework partial build by default.
 _FRAMEWORK_PARTITIONS = {
-    'system', 'product', 'system_ext', 'system_other', 'root', 'system_dlkm',
+    'system', 'product', 'system_ext', 'system_other', 'root',
     'vbmeta_system', 'pvmfw'
 }