um: remove dependency on undefined CC_CAN_LINK_STATIC_NO_RUNTIME_DEPS

CC_CAN_LINK_STATIC_NO_RUNTIME_DEPS is not defined anywhere.

In the submitted patch set [1], the first patch "um/kconfig: introduce
CC_CAN_LINK_STATIC_NO_RUNTIME_DEPS" was not applied.

Only 2/3 and 3/3 were applied, which are now:

- 730586ff7fad ("um: Allow static linking for non-glibc implementations")
- 5e1121cd43d4 ("um: Some fixes to build UML with musl")

Given that nobody has noticed the missing first patch for many years,
it seems it was unnecessary.

[1]: https://lore.kernel.org/lkml/[e-mail]/

Signed-off-by: Masahiro Yamada <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Johannes Berg <[e-mail]>

arch/um/Kconfig

···
 
 config STATIC_LINK
 	bool "Force a static link"
-	depends on CC_CAN_LINK_STATIC_NO_RUNTIME_DEPS || !MAY_HAVE_RUNTIME_DEPS
+	depends on !MAY_HAVE_RUNTIME_DEPS
 	help
 	  This option gives you the ability to force a static link of UML.
 	  Normally, UML is linked as a shared binary.  This is inconvenient for