Revert "general: Add headers explaining the renamed config_*.h"

This reverts commit 47f7d3f29733bdcbc39ece033006f7f9f2d3857b.

These header files have been deprecated for years and can be safely removed now.

makepanda/makepanda.py

@@ -3711,7 +3711,6 @@ TargetAdd('p3putil_composite2.obj', opts=OPTS, input='p3putil_composite2.cxx')
 OPTS=['DIR:panda/src/putil', 'ZLIB']
 IGATEFILES=GetDirectoryContents('panda/src/putil', ["*.h", "*_composite*.cxx"])
 IGATEFILES.remove("test_bam.h")
-IGATEFILES.remove("config_util.h")
 TargetAdd('libp3putil.in', opts=OPTS, input=IGATEFILES)
 TargetAdd('libp3putil.in', opts=['IMOD:panda3d.core', 'ILIB:libp3putil', 'SRCDIR:panda/src/putil'])
 PyTargetAdd('p3putil_ext_composite.obj', opts=OPTS, input='p3putil_ext_composite.cxx')
@@ -3822,7 +3821,6 @@ TargetAdd('p3pstatclient_composite2.obj', opts=OPTS, input='p3pstatclient_compos
 
 OPTS=['DIR:panda/src/pstatclient']
 IGATEFILES=GetDirectoryContents('panda/src/pstatclient', ["*.h", "*_composite*.cxx"])
-IGATEFILES.remove("config_pstats.h")
 TargetAdd('libp3pstatclient.in', opts=OPTS, input=IGATEFILES)
 TargetAdd('libp3pstatclient.in', opts=['IMOD:panda3d.core', 'ILIB:libp3pstatclient', 'SRCDIR:panda/src/pstatclient'])
 PyTargetAdd('p3pstatclient_pStatClient_ext.obj', opts=OPTS, input='pStatClient_ext.cxx')

panda/src/pstatclient/config_pstats.h

@@ -1,2 +0,0 @@
-// This file to remain during the whole 1.10.x cycle; remove after that.
-#error config_pstats.h has been renamed to config_pstatclient.h - please update your project.

panda/src/putil/config_util.h

@@ -1,2 +0,0 @@
-// This file to remain during the whole 1.10.x cycle; remove after that.
-#error config_util.h has been renamed to config_putil.h - please update your project.