Remove static var system_eol_type

* src/coding.c (system_eol_type): Remove.
(coding_inherit_eol_type, syms_of_coding):
Simplify to avoid the need for system_eol_type.
1 job for master in 49 minutes and 37 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Test
failed #1367
test-all

00:49:37

 
Name Stage Failure
failed
test-all Test
Makefile:313: recipe for target 'check-doit' failed
make[2]: *** [check-doit] Error 1
make[2]: Leaving directory '/builds/emacs/emacs/test'
make[1]: *** [check-expensive] Error 2
Makefile:288: recipe for target 'check-expensive' failed
make[1]: Leaving directory '/builds/emacs/emacs/test'
Makefile:962: recipe for target 'check-expensive' failed
make: *** [check-expensive] Error 2
ERROR: Job failed: exit code 1