Avoid downloading the map data during build

mmapper.spec

@@ -32,7 +32,10 @@ data in real time and show player's position in a map.
 %build
 mkdir -p %{_target_platform}
 pushd %{_target_platform}
-%{cmake} -DCMAKE_BUILD_TYPE=Release ..
+%{cmake} \
+  -DCMAKE_BUILD_TYPE=Release \
+  -DWITH_MAP=OFF \
+  ..
 popd
 
 %make_build -C %{_target_platform}
@@ -41,9 +44,6 @@ popd
 %install
 %make_install -C %{_target_platform}
 
-# It is questionable if one is allowed to redistribute the map.
-rm -f $RPM_BUILD_ROOT/%{_datadir}/games/mmapper/arda.mm2
-
 appstream-util validate-relax --nonet $RPM_BUILD_ROOT%{_datadir}/metainfo/org.mume.MMapper.appdata.xml
 desktop-file-validate $RPM_BUILD_ROOT%{_datadir}/applications/org.mume.MMapper.desktop