[posix] remove getline

Author: mysterywolf

components/libc/posix/Kconfig

@@ -44,12 +44,6 @@ config RT_USING_POSIX_CLOCK
     select RT_USING_POSIX_DELAY
     default n
 
-config RT_USING_POSIX_GETLINE
-    bool "Enable getline()/getdelim()"
-    select RT_USING_POSIX_FS
-    select RT_USING_POSIX_DEVIO
-    default n
-
 config RT_USING_PTHREADS
     bool "Enable pthreads APIs"
     select RT_USING_POSIX_CLOCK