[tracker] meson: Remove duplicated line

[Sam Thursfield <sthursfield src gnome org>]

commit d78bcd46b6aab2c65ef3e539e5888ee183116ac9
Author: Sam Thursfield <sam afuera me uk>
Date:   Fri Jun 1 17:32:11 2018 +0200

    meson: Remove duplicated line
    
    This triggered a warning with meson 0.46 and will be treated as an error
    by future versions.

 src/libtracker-sparql-backend/meson.build | 1 -
 1 file changed, 1 deletion(-)
---
diff --git a/src/libtracker-sparql-backend/meson.build b/src/libtracker-sparql-backend/meson.build
index c68eba8db..9849502c5 100644
--- a/src/libtracker-sparql-backend/meson.build
+++ b/src/libtracker-sparql-backend/meson.build
@@ -19,7 +19,6 @@ tracker_sparql_dep = declare_dependency(
     link_with: [libtracker_sparql, libtracker_sparql_intermediate_vala],
     include_directories: srcinc,
     dependencies: [tracker_common_dep, libtracker_sparql_c_vapi_dep],
-    include_directories: srcinc,
 )
 
 # The introspection generation for libtracker-sparql is awkward because we have