c64input.s: fix stray cursor image in host and port entry

This introduces some latency when typing in host name and port. But
I think that's acceptable. (reverted from commit 36369fb714)

drivers/c64input.s

@@ -25,16 +25,8 @@ get_key:
 @loop:
   jsr get_key_if_available
   bcc @loop
-@wait_no_cursor:
-  sei
-  ldy $cf                       ; cursor currently displayed?
-  beq @done                     ; no
-  cli                           ; yes, wait longer
-  bne @wait_no_cursor
-@done:
   ldy #1
   sty $cc                       ; cursor off
-  cli
   rts
 
 ; use C64 Kernel ROM function to read a key