meson: remove obsolete RPATH stripping patch

meson: remove obsolete RPATH stripping patch

As per the release notes for 0.55.0[1], this patch is no longer needed
as Meson now only removes the RPATHs that it adds itself, any RPATHs
added via LDFLAGS or pkgconfig files are left untouched.

[1] https://mesonbuild.com/Release-notes-for-0-55-0.html#rpath-removal-now-more-careful

Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
(cherry picked from commit 4011c0fadec98f1001046079f59e4e2a4a3a3fcf)
Signed-off-by: Steve Sakoman <steve@sakoman.com>