mesa: remove obsolete deletion of .la files

As Mesa is built with Meson now, there's no need to delete the .la files
as they're not installed in the first place.

(From OE-Core rev: 7cc1288c0121268b02ab26d0b032cee6cb9eacb4)

Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-graphics/mesa/mesa.inc

@@ -256,12 +256,6 @@ PACKAGES =+ "libegl-mesa libegl-mesa-dev \
             "
 
 do_install:append () {
-    # Drivers never need libtool .la files
-    rm -f ${D}${libdir}/dri/*.la
-    rm -f ${D}${libdir}/egl/*.la
-    rm -f ${D}${libdir}/gallium-pipe/*.la
-    rm -f ${D}${libdir}/gbm/*.la
-
     # libwayland-egl has been moved to wayland 1.15+
     rm -f ${D}${libdir}/libwayland-egl*
     rm -f ${D}${libdir}/pkgconfig/wayland-egl.pc