Remove BuildVersion also from Android and iOS version ini files

...after 5fdf2009d2 "tdf#134522 remove
--with-build-version ./configure flag", 00fa759dc9
"tdf#135133: Don't try to read BuildVersion", and
6ee46adb44 "Remove BuildVersion from installation
set version ini files" already removed it from anywhere else

Change-Id: I42ccf35d6952ad0a826517ecadfe0ebb3bb704a0
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/101003
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

android/source/build.gradle

@@ -284,7 +284,6 @@ task createRCfiles {
         versionrc.text = '''\
             [Version]
             AllLanguages=en-US
-            BuildVersion=
             buildid=''' + "${liboGitFullCommit}" + '''
             ReferenceOOoMajorMinor=4.1
             '''.stripIndent()

ios/CustomTarget_iOS_setup.mk

@@ -112,7 +112,6 @@ $(IOSGEN)/native-code.h: $(BUILDDIR)/config_host.mk \
 
 	(echo '[Version]' \
 	&& echo 'AllLanguages=en-US' \
-	&& echo 'BuildVersion=' \
 	&& echo "buildid=$(shell git -C $(SRCDIR) log -1 --format=%H)" \
 	    ) > $(IOSRES)/program/versionrc