tools: Remove unused argument
Since Meson 0.60.0, i18n.merge_file no longer accepts positional arguments, causing the build to fail with the message:
"libgda/tools/browser/meson.build:87:5: ERROR: Function does not take positional arguments."
Since Meson 0.60.0, i18n.merge_file no longer accepts positional arguments, causing the build to fail with the message:
"libgda/tools/browser/meson.build:87:5: ERROR: Function does not take positional arguments."