8078561: Error message should be generated once when -source 6 is specified
Summary: Code to avoid duplicated errors about features not supported in the current source level moved to Log
Reviewed-by: jjg
T6245591.java:8:5: compiler.warn.missing.deprecated.annotation
T6245591.java:15:27: compiler.warn.has.been.deprecated: WINTER, Season
2 warnings