Delete misleading section on "module file path"

This was never accurate and doesn't really belong in the modules
section since modules have nothing to do with the load path other
than the fact that packages define a module and packages the load
path affects what packages can be loaded.

doc/src/manual/modules.md

@@ -183,19 +183,6 @@ look for `Utils` in `Parent`'s enclosing module rather than in `Parent` itself.
 
 Note that relative-import qualifiers are only valid in `using` and `import` statements.
 
-### Module file paths
-
-The global variable [`LOAD_PATH`](@ref) contains the directories Julia searches for modules when calling
-`require`. It can be extended using [`push!`](@ref):
-
-```julia
-push!(LOAD_PATH, "/Path/To/My/Module/")
-```
-
-Putting this statement in the file `~/.julia/config/startup.jl` will extend [`LOAD_PATH`](@ref) on
-every Julia startup. Alternatively, the module load path can be extended by defining the environment
-variable `JULIA_LOAD_PATH`.
-
 ### Namespace miscellanea
 
 If a name is qualified (e.g. `Base.sin`), then it can be accessed even if it is not exported.