Fix build-time warning with meson 0.50.1
Commit 6666dee5 ("man: Add weston-bindings(7) describing desktop shell shortcuts") adds in file "man/meson.build" the line install: true, This line triggers a warning with meson 0.50.1: WARNING: Project targetting '>= 0.47' but tried to use feature introduced in '0.50.0': install arg in configure_file
Accordingly with https://github.com/mesonbuild/meson/issues/5048 the line was silently ignored by meson before 0.50.0
One possible fix for this warning would require updating the minumum version of meson required by weston, but then forcing every builder to update meson. Instead, since all the other instances in "man/meson.build" of configure_file don't use the feature "install:", it seams safe to simply remove the feature for the instal of "weston-bindings.man".
Signed-off-by: Antonio Borneo borneo.antonio@gmail.com