python-pygobject: Tune remove operation

Drop '-f, --force' operator from rm command as that will hide the fact
if the removed artifacts cease to exist in later version of this recipe.
Also drop a superfluous slash from artifact path.

Signed-off-by: Niko Mauno <niko.mauno@iki.fi>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/recipes-devtools/python/python-pygobject_3.28.3.bb

@@ -27,5 +27,5 @@ RDEPENDS_${PN}_class-native = ""
 
 do_install_append() {
     # Remove files that clash with python3-pygobject; their content is same
-    rm -rf ${D}${includedir}/pygobject-3.0//pygobject.h ${D}${libdir}/pkgconfig
+    rm -r ${D}${includedir}/pygobject-3.0/pygobject.h ${D}${libdir}/pkgconfig
 }