Converted absl_utility to Header-only cmake target

absl/utility/CMakeLists.txt

@@ -25,13 +25,9 @@ list(APPEND UTILITY_SRC
   ${UTILITY_PUBLIC_HEADERS}
   ${UTILITY_PUBLIC_HEADERS}
 )
 )
 
 
-absl_library(
+absl_header_library(
   TARGET
   TARGET
     absl_utility
     absl_utility
-  SOURCES
-    ${UTILITY_SRC}
-  PUBLIC_LIBRARIES
-    ${UTILITY_PUBLIC_LIBRARIES}
   EXPORT_NAME
   EXPORT_NAME
     utility
     utility
 )
 )