[libgda: 1/2] Meson: Removing m4 directory

[Daniel Espinosa Ortiz <despinosa src gnome org>]

commit e32d71ba40a72515a847e12b91e762c0d4bc711b
Author: Pavlo Solntsev <p sun fun gmail com>
Date:   Mon Mar 9 22:26:17 2020 -0500

    Meson: Removing m4 directory
    
    This directory was left from autotools system after porting to Meson.

 m4/.gitignore    |   7 --
 m4/bdb.m4        | 289 ---------------------------------------------
 m4/dk-warn.m4    | 110 -----------------
 m4/firebird.m4   | 251 ---------------------------------------
 m4/glibtests.m4  |  31 -----
 m4/java.m4       | 350 -------------------------------------------------------
 m4/ldap.m4       | 183 -----------------------------
 m4/mdbtools.m4   | 259 ----------------------------------------
 m4/misc.m4       |  21 ----
 m4/mysql.m4      | 216 ----------------------------------
 m4/oracle.m4     | 180 ----------------------------
 m4/postgresql.m4 | 191 ------------------------------
 m4/vapigen.m4    | 177 ----------------------------
 13 files changed, 2265 deletions(-)