Remove duplicate definitions of utility variables
These are set by the core build system, and are becoming read-only.
Bug: 76424357
Test: diff build-aosp_arm.ninja
Change-Id: Ia1ace7a6b3e3cb5524294421a2144dbed3dca520
diff --git a/libandroid_net_lowpan/tests/Android.mk b/libandroid_net_lowpan/tests/Android.mk
index b914d81..7339b32 100644
--- a/libandroid_net_lowpan/tests/Android.mk
+++ b/libandroid_net_lowpan/tests/Android.mk
@@ -34,10 +34,6 @@
# This only works if the class name matches the file name and the directory structure
# matches the package.
local_classes := $(subst /,.,$(patsubst src/%.java,%,$(local_java_files)))
-# Utility variables to allow replacing a space with a comma
-comma:= ,
-empty:=
-space:= $(empty) $(empty)
# Convert class name list to jacoco exclude list
# This appends a * to all classes and replace the space separators with commas.
# These patterns will match all classes in this module and their inner classes.