Move initialization of cmd->fmt into init_formats().

init_formats() sets up the command formats, and currently sets cmd->fmt_backup
but does not set cmd->fmt to a default value.  This seems incorrect so we
set it to cmd->default_settings.fmt before returning.

The call we remove here may set cmd->fmt based on a command line setting.
But it is safe to remove this, because the only caller of init_lvm() that
cares about the cmdline override is the cmdline tools (clvmd does not care),
called from lvm2_main().  After lvm2_main() calls init_lvm(), it later calls
lvm_run_command().  In lvm_run_command(), we have a call to _apply_settings(),
which has the identical assignment of cmd->fmt that this patch removes.

lib/commands/toolcontext.c

@@ -784,6 +784,7 @@ static int _init_formats(struct cmd_context *cmd)
 		if (!strcasecmp(fmt->name, format) ||
 		    (fmt->alias && !strcasecmp(fmt->alias, format))) {
 			cmd->default_settings.fmt = fmt;
+			cmd->fmt = cmd->default_settings.fmt;
 			return 1;
 		}
 	}

tools/lvmcmdline.c

@@ -1094,9 +1094,6 @@ struct cmd_context *init_lvm(unsigned is_static)
 	init_full_scan_done(0);
 	init_mirror_in_sync(0);
 
-	cmd->fmt = arg_ptr_value(cmd, metadatatype_ARG,
-				 cmd->current_settings.fmt);
-
 	return cmd;
 }