tests/tcg: remove duplicate EXTRA_RUNS

We set it bellow outside the #if leg.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20211026102234.3961636-28-alex.bennee@linaro.org>

tests/tcg/multiarch/Makefile.target

@@ -61,8 +61,6 @@ run-gdbstub-sha1: sha1
 		--bin $< --test $(MULTIARCH_SRC)/gdbstub/sha1.py, \
 	"basic gdbstub support")
 
-EXTRA_RUNS += run-gdbstub-sha1
-
 run-gdbstub-qxfer-auxv-read: sha1
 	$(call run-test, $@, $(GDB_SCRIPT) \
 		--gdb $(HAVE_GDB_BIN) \