drop ut coverage compile option

Signed-off-by: Ncheng_jinsong <chengjinsong2@huawei.com>
Change-Id: Ie847c61b7362a2249bb274bd0f2e960a3146ad3c

test/unittest/BUILD.gn

@@ -17,8 +17,6 @@ config("utest_config") {
   visibility = [ ":*" ]
 
   cflags = [
-    "-fprofile-arcs",
-    "-ftest-coverage",
     "-Wno-implicit-fallthrough",
     "-Wno-unused-function",
   ]
@@ -26,8 +24,6 @@ config("utest_config") {
     "-Wno-implicit-fallthrough",
     "-fexceptions",
   ]
-
-  ldflags = [ "--coverage" ]
 }
 
 FSCRYPT_PATH =