Revert "dev-libs/nanomsg: make tests sequential"

This reverts commit aaf34a56f3.

I debugged outdated ebuild: =dev-libs/nanomsg-0.8

dev-libs/nanomsg/nanomsg-1.0.0.ebuild

@@ -34,12 +34,3 @@ multilib_src_configure() {
 	fi
 	cmake-utils_src_configure
 }
-
-multilib_src_test() {
-	local myctestargs=(
-		# All tests overwrite same ./test binary
-		# That causes SIGSEGV when ran in parallel
-		-j1
-	)
-	cmake-utils_src_test
-}