refactor: remove redundant struct names

A struct can be anonymous if only its typedef is used.

src/nvim/profile.c

@@ -35,7 +35,7 @@
 #endif
 
 /// Struct used in sn_prl_ga for every line of a script.
-typedef struct sn_prl_S {
+typedef struct {
   int snp_count;                ///< nr of times line was executed
   proftime_T sn_prl_total;      ///< time spent in a line + children
   proftime_T sn_prl_self;       ///< time spent in a line itself