Remove duplicate SET_OP_XX definitions in t_set.c. (#4326)
Remove duplicate SET_OP_XX definitions in t_set.c. (#4326)

These definitions already exist in server.h.
oranagra/redis,soloestoy/redis,antirez/redis,yossigo/redis,charsyam/redis,neomantra/redis,PKRoma/redis,oranagra/redis,charsyam/redis,neomantra/redis,antirez/redis,antirez/redis,PKRoma/redis,ofirluzon/redis,neomantra/redis,yossigo/redis,yossigo/redis,soloestoy/redis,neomantra/redis,oranagra/redis,ofirluzon/redis,soloestoy/redis,neomantra/redis,ofirluzon/redis,oranagra/redis,PKRoma/redis,yossigo/redis,ofirluzon/redis,charsyam/redis,charsyam/redis,yossigo/redis,charsyam/redis,PKRoma/redis,oranagra/redis,soloestoy/redis,soloestoy/redis,ofirluzon/redis,antirez/redis,PKRoma/redis