Cleanup references to system/core/liblog -> system/logging/liblog

BUG: 170387172
Test: TH
Change-Id: Ibb503b051582ff06a298a9e64e52981c0c089b4c
diff --git a/liblog b/liblog
deleted file mode 120000
index 71443ae..0000000
--- a/liblog
+++ /dev/null
@@ -1 +0,0 @@
-../logging/liblog
\ No newline at end of file