8169720: jimage help message for --include option should be corrected

Reviewed-by: alanb, sundar

jdk/src/jdk.jlink/share/classes/jdk/tools/jimage/resources/jimage.properties

@@ -71,9 +71,7 @@ main.opt.footer=\
 \ separated list of elements each using one the following forms:\n\
 \  <glob-pattern>\n\
 \  glob:<glob-pattern>\n\
-\  regex:<regex-pattern>\n\
-\  @<filename> where filename is the name of a file containing patterns to be\
-\ used, one pattern per line\n\
+\  regex:<regex-pattern>
 
 
 main.opt.full-version=\