move case functions and char predicates back to Base (#25479)

fixes #25394

Author: JeffBezanson

src/Distributed.jl

@@ -17,7 +17,6 @@ using Base: Process, Semaphore, JLOptions, AnyDict, buffer_writes, wait_connecte
             binding_module, notify_error, atexit, julia_exename, julia_cmd,
             AsyncGenerator, acquire, release, invokelatest,
             shell_escape_posixly, uv_error, coalesce, notnothing
-using Base.Unicode: isdigit, isnumeric
 
 # NOTE: clusterserialize.jl imports additional symbols from Base.Serializer for use
 

test/distributed_exec.jl

@@ -532,7 +532,6 @@ generic_map_tests(pmap_fallback)
 
 # pmap with various types. Test for equivalence with map
 run_map_equivalence_tests(pmap)
-using Base.Unicode: uppercase
 @test pmap(uppercase, "Hello World!") == map(uppercase, "Hello World!")