config.mak.dev: drop -Wno-sign-compare

There is no need anymore to disable `-Wsign-compare` now that all files
that cause warnings have been marked accordingly. Drop the option.

Signed-off-by: Patrick Steinhardt <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: pks-t

config.mak.dev

@@ -53,7 +53,6 @@ ifeq ($(filter extra-all,$(DEVOPTS)),)
 # These are disabled because we have these all over the place.
 DEVELOPER_CFLAGS += -Wno-empty-body
 DEVELOPER_CFLAGS += -Wno-missing-field-initializers
-DEVELOPER_CFLAGS += -Wno-sign-compare
 endif
 endif