Omit duplicate test of current directory

* src/callproc.c (encode_current_directory): Remove redundant
call to Ffile_accessible_directory_p.  The code checks the
encoded name with file_accessible_directory_p anyway.
1 job for master in 54 minutes and 35 seconds (queued for 1 second)
Status Job ID Name Coverage
failed #3254


Name Stage Failure
test-all Test
Makefile:319: recipe for target 'check-doit' failed
make[2]: *** [check-doit] Error 1
make[2]: Leaving directory '/builds/emacs/emacs/test'
Makefile:294: recipe for target 'check-expensive' failed
make[1]: *** [check-expensive] Error 2
make[1]: Leaving directory '/builds/emacs/emacs/test'
Makefile:959: recipe for target 'check-expensive' failed
make: *** [check-expensive] Error 2
ERROR: Job failed: exit code 1