configure.ac : completely kill the --enable/disable--verbose thing

There is no legitimate use case... no-one need or want to see
the build output with all the command by default.. and if one is
enclined to do such things, verbose=t in the env does the trick
leaving that as a configure options garantee bit-root (as it was the case)
and just make it bigger for nothing.. worse may encourage newcomer
to shoot themselves in the foot

Change-Id: I2b892c623b72dff68ae61dc4edb2478613efc699
Reviewed-on: https://gerrit.libreoffice.org/17635Reviewed-by: Norbert Thiebaud <nthiebaud@gmail.com>
Tested-by: Norbert Thiebaud <nthiebaud@gmail.com>

config_host.mk.in

@@ -614,7 +614,6 @@ export VALGRIND_CFLAGS=$(gb_SPACE)@VALGRIND_CFLAGS@
 export VALIDATOR_EXTENSION_PACK=@VALIDATOR_EXTENSION_PACK@
 export VCVER=@VCVER@
 export DEVENV=@DEVENV@
-export verbose?=@verbose@
 export VISIO_CFLAGS=$(gb_SPACE)@VISIO_CFLAGS@
 export VISIO_LIBS=$(gb_SPACE)@VISIO_LIBS@
 export WATCH_WINDOW_EXTENSION_PACK=@WATCH_WINDOW_EXTENSION_PACK@

configure.ac

@@ -1276,12 +1276,6 @@ AC_ARG_ENABLE(build-unowinreg,
     ],
 ,)
 
-AC_ARG_ENABLE(verbose,
-    AS_HELP_STRING([--enable-verbose],
-        [Increase build verbosity.])[
-  --disable-verbose       Decrease build verbosity.],
-,)
-
 AC_ARG_ENABLE(dependency-tracking,
     AS_HELP_STRING([--enable-dependency-tracking],
         [Do not reject slow dependency extractors.])[
@@ -12721,25 +12715,6 @@ AC_DEFINE_UNQUOTED(ONEDRIVE_CLIENT_ID, $ONEDRIVE_CLIENT_ID)
 AC_DEFINE_UNQUOTED(ONEDRIVE_CLIENT_SECRET, $ONEDRIVE_CLIENT_SECRET)
 
 
-# ===================================================================
-# De- or increase default verbosity of build process
-# ===================================================================
-AC_MSG_CHECKING([build verbosity])
-verbose=
-if test -n "$enable_verbose"; then
-    if test "$enable_verbose" = "yes"; then
-        verbose="t"
-        AC_MSG_RESULT([high])
-    fi
-    if test "$enable_verbose" = "no"; then
-        verbose=
-        AC_MSG_RESULT([low])
-    fi
-else
-    AC_MSG_RESULT([not set])
-fi
-AC_SUBST(verbose)
-
 dnl ===================================================================
 dnl Hook up LibreOffice's nodep environmental variable to automake's equivalent
 dnl --enable-dependency-tracking configure option