fix: remove routing-api from go.mod dependencies

routing-api is a local submodule in src/code.cloudfoundry.org/routing-api,
not an external dependency. It should not be listed in go.mod.

This was incorrectly added during rebase conflict resolution.

Author: rkoster

src/code.cloudfoundry.org/go.mod

@@ -15,7 +15,6 @@ require (
 	code.cloudfoundry.org/lager/v3 v3.65.0
 	code.cloudfoundry.org/localip v0.67.0
 	code.cloudfoundry.org/locket v0.0.0-20251117222557-be612341b29d
-	code.cloudfoundry.org/routing-api v0.0.0-20260121170017-b01cc94c976d
 	code.cloudfoundry.org/tlsconfig v0.50.0
 	github.com/armon/go-proxyproto v0.1.0
 	github.com/cactus/go-statsd-client v3.2.1+incompatible

src/code.cloudfoundry.org/go.sum

@@ -620,8 +620,6 @@ code.cloudfoundry.org/localip v0.66.0 h1:Y7A8t1egFxBXO/Cx+Sa9QC42D5WLycOV3d8/H/u
 code.cloudfoundry.org/localip v0.66.0/go.mod h1:tNclRPBuTRD2B34QjpP3T9Tg+fV0lX4sMAEKu98jDiM=
 code.cloudfoundry.org/locket v0.0.0-20251117222557-be612341b29d h1:UQBC4hxKpaSc0lNcVafX71I8NLBncxDoWdSX2JTtRBA=
 code.cloudfoundry.org/locket v0.0.0-20251117222557-be612341b29d/go.mod h1:AwHLRkdXtttLXNB8RHgLfErJ2kKafH62AR2OClhy6xI=
-code.cloudfoundry.org/routing-api v0.0.0-20260121170017-b01cc94c976d h1:FrY6CqmjxZz2Y6HoxjNdBGC0TXXcwEi83LpTHUsz5TU=
-code.cloudfoundry.org/routing-api v0.0.0-20260121170017-b01cc94c976d/go.mod h1:zvOkz/tZMCCr9jvq4xeFf8kzTnRjLrJQZn6jMtShfCA=
 code.cloudfoundry.org/tlsconfig v0.49.0 h1:ponDsxilO6+N1evL7fyGJFH+PJXIriKAsvNI/5QUAn0=
 code.cloudfoundry.org/tlsconfig v0.49.0/go.mod h1:ghAEm7G6wcxlQ9ZihAqzPYde2VaQ44bP3Ud4ewDwuUE=
 dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=