Remove redundantly listed Ubuntu package for building.

Author: qbarnes

doc/building-client.md

@@ -12,7 +12,7 @@ install some support packages. **You will need to check out git with submodules
   - For Linux with Ubuntu/Debian:
     `libudev-dev` `libsqlite3-dev` `protobuf-compiler` `libfmt-dev`
     `libprotobuf-dev` `libmagic-dev` `libmbedtls-dev` `libcurl4-openssl-dev`
-    `libmagic-dev` `libdbus-1-dev` `libglfw3-dev` `libfreetype-dev`
+    `libdbus-1-dev` `libglfw3-dev` `libfreetype-dev`
     `libboost-regex-dev` Plus, optionally (if not present, internal versions
     will be used): `nlohmann-json3-dev` `libcli11-dev` `libmd4c-dev`
   - For Linux with RHEL+EPEL/Fedora: