cmake: get rid of CMAKE_C_FLAGS_COVERAGE
...because these are not actually set from anywhere in this repo.
@@ -74,7 +74,7 @@ set(LIBNETCONF2_SOVERSION ${LIBNETCONF2_MAJOR_SOVERSION})
# libyang SO version required
set(LIBYANG_DEP_SOVERSION_MAJOR 2)
-set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${CMAKE_C_FLAGS_COVERAGE} -Wall -Wextra -fvisibility=hidden -std=gnu99")
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wextra -fvisibility=hidden -std=gnu99")
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