Remove duplicate mention of Interacting with Julia in manual index (#18968)

nalimilan · tkelman · commit 1ea0de18a623 · 2016-10-17T05:32:02.000-07:00
Introduced when syncing two variants of the index.
diff --git a/doc/manual/index.rst b/doc/manual/index.rst
@@ -31,7 +31,6 @@
    networking-and-streams
    parallel-computing
    dates
-   interacting-with-julia
    running-external-programs
    calling-c-and-fortran-code
    handling-operating-system-variation
