build: remove PVS

We already have an extensive suite of static analysis tools we use,
which causes a fair bit of redundancy as we get duplicate warnings. PVS
is also prone to give false warnings which creates a lot of work to
identify and disable.

src/nvim/rbuffer.h

@@ -38,8 +38,6 @@ struct rbuffer;
 //
 // Note that the rbuffer_{produced,consumed} calls are necessary or these macros
 // create infinite loops
-//
-// -V:RBUFFER_UNTIL_EMPTY:1044
 #define RBUFFER_UNTIL_EMPTY(buf, rptr, rcnt) \
   for (size_t rcnt = 0, _r = 1; _r; _r = 0)  /* NOLINT(readability/braces) */ \
   for (char *rptr = rbuffer_read_ptr(buf, &rcnt);  /* NOLINT(readability/braces) */ \