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/syntax.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
-
 // syntax.c: code for syntax highlighting
 
 #include <assert.h>
@@ -239,8 +236,6 @@ static keyentry_T dumkey;
 #define HIKEY2KE(p)   ((keyentry_T *)((p) - (dumkey.keyword - (char *)&dumkey)))
 #define HI2KE(hi)      HIKEY2KE((hi)->hi_key)
 
-// -V:HI2KE:782
-
 // To reduce the time spent in keepend(), remember at which level in the state
 // stack the first item with "keepend" is present.  When "-1", there is no
 // "keepend" on the stack.
@@ -5059,7 +5054,7 @@ static int get_id_list(char **const arg, const int keylen, int16_t **const list,
                   xfree(retval);
                   round = 1;
                 } else {
-                  retval[count] = (int16_t)(i + 1);  // -V522
+                  retval[count] = (int16_t)(i + 1);
                 }
               }
               count++;