3dslicer: remove duplicate config

Signed-off-by: Hu Butui <hot123tea123@gmail.com>

Author: hubutui

archlinuxcn/3dslicer/PKGBUILD

@@ -97,7 +97,6 @@ build() {
     -DSlicer_USE_SYSTEM_LibArchive=ON \
     -DSlicer_USE_SYSTEM_LibFFI=ON \
     -DSlicer_USE_SYSTEM_LZMA=ON \
-    -DSlicer_USE_SYSTEM_LZMA=ON \
     -DSlicer_USE_SYSTEM_OpenSSL=ON \
     -DSlicer_USE_SYSTEM_ParameterSerializer=OFF \
     -DSlicer_USE_SYSTEM_PCRE2=OFF \