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/mpack/conv.c

@@ -1,6 +1,3 @@
-// This is an open source non-commercial project. Dear PVS-Studio, please check
-// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
-
 #include "conv.h"
 
 static int mpack_fits_single(double v);

src/mpack/lmpack.c

@@ -1,6 +1,3 @@
-// This is an open source non-commercial project. Dear PVS-Studio, please check
-// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
-
 /*
  * This module exports three classes, and each instance of those classes has its
  * own private registry for temporary reference storage(keeping state between
@@ -246,7 +243,7 @@ static mpack_uint32_t lmpack_objlen(lua_State *L, int *is_array)
   }
 
 end:
-  if ((size_t)-1 > (mpack_uint32_t)-1 && len > (mpack_uint32_t)-1) // -V560
+  if ((size_t)-1 > (mpack_uint32_t)-1 && len > (mpack_uint32_t)-1)
     /* msgpack spec doesn't allow lengths > 32 bits */
     len = (mpack_uint32_t)-1;
   assert(top == lua_gettop(L));

src/mpack/mpack_core.c

@@ -1,6 +1,3 @@
-// This is an open source non-commercial project. Dear PVS-Studio, please check
-// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
-
 #include <string.h>
 
 #include "mpack_core.h"

src/mpack/object.c

@@ -1,6 +1,3 @@
-// This is an open source non-commercial project. Dear PVS-Studio, please check
-// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
-
 #include <string.h>
 
 #include "object.h"

src/mpack/rpc.c

@@ -1,6 +1,3 @@
-// This is an open source non-commercial project. Dear PVS-Studio, please check
-// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
-
 #include <string.h>
 
 #include "rpc.h"