Support only new CLang version

Support only new CLang version by enabling only
`-fno-sanitize-recover=undefined,integer`
diff --git a/CMakeLists.txt b/CMakeLists.txt
index c11f863..a5f4bac 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -84,16 +84,8 @@
     set(CMAKE_C_FLAGS_RELEASE     "-O2")
     set(CMAKE_C_FLAGS_DEBUG       "-O0 -g3")
     set(CMAKE_C_FLAGS_COVERAGE    "-O0 -g3 --coverage")
-    EXECUTE_PROCESS( COMMAND ${CMAKE_C_COMPILER} --version OUTPUT_VARIABLE clang_full_version_string )
-    string (REGEX REPLACE ".*clang version ([0-9]+\\.[0-9]+).*" "\\1" CLANG_VERSION_STRING ${clang_full_version_string})
-
-    if(CLANG_VERSION_STRING VERSION_GREATER 3.5)
-        set(CMAKE_C_FLAGS_ASAN        "-Werror -fsanitize=address -fno-common -fsanitize=undefined -fno-sanitize-recover=undefined,integer -O3")
-        set(CMAKE_C_FLAGS_ASANDBG     "-Werror -fsanitize=address -fno-common -fsanitize=undefined -fno-sanitize-recover=undefined,integer -O1 -g3 -fno-omit-frame-pointer -fno-optimize-sibling-calls ")
-    else()
-        set(CMAKE_C_FLAGS_ASAN        "-Werror -fsanitize=address -fno-common -fsanitize=undefined -fno-sanitize-recover -O3")
-        set(CMAKE_C_FLAGS_ASANDBG     "-Werror -fsanitize=address -fno-common -fsanitize=undefined -fno-sanitize-recover -O1 -g3 -fno-omit-frame-pointer -fno-optimize-sibling-calls ")
-    endif()
+    set(CMAKE_C_FLAGS_ASAN        "-Werror -fsanitize=address -fno-common -fsanitize=undefined -fno-sanitize-recover=undefined,integer -O3")
+    set(CMAKE_C_FLAGS_ASANDBG     "-Werror -fsanitize=address -fno-common -fsanitize=undefined -fno-sanitize-recover=undefined,integer -O1 -g3 -fno-omit-frame-pointer -fno-optimize-sibling-calls ")
     set(CMAKE_C_FLAGS_MEMSAN      "-Werror -fsanitize=memory -O3")
     set(CMAKE_C_FLAGS_MEMSANDBG   "-Werror -fsanitize=memory -O1 -g3 -fno-omit-frame-pointer -fno-optimize-sibling-calls -fsanitize-memory-track-origins=2")
     set(CMAKE_C_FLAGS_CHECK       "-Werror -Os")