Remove unnecessary DDNET_TEST_NO_LINK=1 in Android build

Verified with clean build, the variable is not necessary. Closes #8420.

scripts/android/cmake_android.sh

@@ -139,7 +139,6 @@ function build_for_type() {
 		-DCMAKE_ANDROID_ARCH_ABI="${2}" \
 		-DCARGO_NDK_TARGET="${3}" \
 		-DCARGO_NDK_API="$ANDROID_API_LEVEL" \
-		-DDDNET_TEST_NO_LINK=ON \
 		-B"${BUILD_FOLDER}/$ANDROID_SUB_BUILD_DIR/$1" \
 		-DSERVER=OFF \
 		-DTOOLS=OFF \