8173715: Remove FlatProfiler

Obsoleted Xprof flag, removed FlatProfiler code

Reviewed-by: mchung

jdk/src/java.base/share/classes/sun/launcher/resources/launcher.properties

@@ -137,7 +137,6 @@ java.launcher.X.usage=\n\
 \    -Xms<size>        set initial Java heap size\n\
 \    -Xmx<size>        set maximum Java heap size\n\
 \    -Xnoclassgc       disable class garbage collection\n\
-\    -Xprof            output cpu profiling data (deprecated)\n\
 \    -Xrs              reduce use of OS signals by Java/VM (see documentation)\n\
 \    -Xshare:auto      use shared class data if possible (default)\n\
 \    -Xshare:off       do not attempt to use shared class data\n\

jdk/src/linux/doc/man/java.1

@@ -921,11 +921,6 @@ When you specify
 at startup, the class objects in the application will be left untouched during GC and will always be considered live\&. This can result in more memory being permanently occupied which, if not used carefully, will throw an out of memory exception\&.
 .RE
 .PP
-\-Xprof
-.RS 4
-Profiles the running program and sends profiling data to standard output\&. This option is provided as a utility that is useful in program development and is not intended to be used in production systems\&.
-.RE
-.PP
 \-Xrs
 .RS 4
 Reduces the use of operating system signals by the JVM\&.

jdk/src/solaris/doc/sun/man/man1/java.1

@@ -921,11 +921,6 @@ When you specify
 at startup, the class objects in the application will be left untouched during GC and will always be considered live\&. This can result in more memory being permanently occupied which, if not used carefully, will throw an out of memory exception\&.
 .RE
 .PP
-\-Xprof
-.RS 4
-Profiles the running program and sends profiling data to standard output\&. This option is provided as a utility that is useful in program development and is not intended to be used in production systems\&.
-.RE
-.PP
 \-Xrs
 .RS 4
 Reduces the use of operating system signals by the JVM\&.