Removes duplicate swift in labeler (#6228)
Removes duplicate swift in labeler (#6228)

Removed grpc tag from swift label set & removes duplicate swift label
alexames/flatbuffers,alexames/flatbuffers,alexames/flatbuffers,evolutional/flatbuffers,evolutional/flatbuffers,alexames/flatbuffers,alexames/flatbuffers,google/flatbuffers,DavadDi/flatbuffers,DavadDi/flatbuffers,google/flatbuffers,alexames/flatbuffers,google/flatbuffers,DavadDi/flatbuffers,google/flatbuffers,google/flatbuffers,DavadDi/flatbuffers,evolutional/flatbuffers,google/flatbuffers,alexames/flatbuffers,evolutional/flatbuffers,evolutional/flatbuffers,google/flatbuffers,google/flatbuffers,alexames/flatbuffers,evolutional/flatbuffers,google/flatbuffers,evolutional/flatbuffers,evolutional/flatbuffers,google/flatbuffers,DavadDi/flatbuffers,evolutional/flatbuffers,google/flatbuffers,alexames/flatbuffers,alexames/flatbuffers,alexames/flatbuffers,evolutional/flatbuffers,alexames/flatbuffers,google/flatbuffers,google/flatbuffers,google/flatbuffers,google/flatbuffers,alexames/flatbuffers,alexames/flatbuffers,DavadDi/flatbuffers,evolutional/flatbuffers,evolutional/flatbuffers,alexames/flatbuffers,evolutional/flatbuffers