man pages: remove extraneous PP macros

Clears warnings from `mandoc -T lint` of the forms:
mandoc: Xorg.man:26:2: WARNING: skipping paragraph macro: PP after SH
mandoc: Xorg.man:40:2: WARNING: skipping paragraph macro: PP empty

Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/2009>

hw/kdrive/ephyr/man/Xephyr.man

@@ -76,7 +76,6 @@ The
 delay between this can be altered by setting a XEPHYR_PAUSE env var to
 a value in micro seconds.
 .SH CAVEATS
-.PP
 .IP \(bu 2
 Rotated displays are currently updated via full blits. This
 is slower than a normal orientated display. Debug mode will

hw/vfb/man/Xvfb.man

@@ -48,7 +48,6 @@ rendering engine, load testing, as an aid to porting the X server to a
 new platform, and providing an unobtrusive way to run applications
 that don't really need an X server but insist on having one anyway.
 .SH OPTIONS
-.PP
 In addition to the normal server options described in the
 .BR Xserver (1)
 manual page, \fIXvfb\fP accepts the following command line switches:
@@ -119,7 +118,6 @@ and will use memory mapped files in /var/tmp for the framebuffer.
 xwud -in /var/tmp/Xvfb_screen0
 Displays screen 0 of the server started by the preceding example.
 .SH "SEE ALSO"
-.PP
 .BR X (@miscmansuffix@),
 .BR Xserver (1),
 .BR xwd (1),

hw/xfree86/man/Xorg.man

@@ -23,7 +23,6 @@ The XFree86 release was originally derived from
 by Thomas Roell which was contributed to X11R5 by Snitily Graphics
 Consulting Service.
 .SH PLATFORMS
-.PP
 .B Xorg
 operates under a wide range of operating systems and hardware platforms.
 The Intel x86 (IA32) architecture is the most widely supported hardware
@@ -37,7 +36,6 @@ GNU Hurd.  Mac OS X is supported with the
 X server.  Win32/Cygwin is supported with the
 .BR XWin (@appmansuffix@)
 X server.
-.PP
 .SH "NETWORK CONNECTIONS"
 .B Xorg
 supports connections made using the following reliable
@@ -400,7 +398,6 @@ Print out the server version, patchlevel, release date, the operating
 system/platform it was built on, and whether it includes module loader
 support.
 .SH "KEYBOARD"
-.PP
 The
 .B Xorg
 server is normally configured to recognize various special combinations
@@ -657,7 +654,6 @@ information can be found from the X.Org web site
 \fI<https://www.x.org/>\fP.
 
 .SH LEGAL
-.PP
 .B Xorg
 is copyright software, provided under licenses that permit modification
 and redistribution in source and binary form without fee.

hw/xquartz/man/Xquartz.man

@@ -91,7 +91,6 @@ This option defaults to false and is only accessible through the command line.
 .B defaults write @bundle_id_prefix@.X11 scroll_in_device_direction -boolean true
 This option defaults to false.  Enable this option to ensure that X11 scroll events are always in the direction of the device.  This overrides the related option in the Mouse/Trackpad section of System Preferences.
 .SH OPTIONS
-.PP
 In addition to the normal server options described in the
 .BR Xserver (1)
 manual page, \fIXquartz\fP accepts the following command line switches:
@@ -145,7 +144,6 @@ and ASL_LEVEL_NOTICE respectively.  In order to see these messages in syslog,
 you will need to adjust XQuartz's asl mask as above but using -i or -n
 instead of -d.
 .SH "SEE ALSO"
-.PP
 .BR X (@miscmansuffix@),
 .BR Xserver (1),
 .BR xdm (1),
@@ -154,7 +152,6 @@ instead of -d.
 .BR syslogd (8)
 .PP
 https://www.xquartz.org/
-.PP
 .SH AUTHORS / HISTORY
 X11 was originally ported to Mac OS X Server by John Carmack.  Dave
 Zarzycki used this as the basis of his port of XFree86 4.0 to Darwin 1.0.

hw/xwin/man/XWinrc.man

@@ -136,7 +136,6 @@ such items should be included at the start or at the end of the menu.
 
 .SH Icon Instructions
 When specifying an \fIicon-specifier\fP in the following commands several different formats are allowed:
-.PP
 .IP \fI"NAME.ICO"\fP 16
 filename of an .ico format file
 .br