*: Fix linter errors

Drops comments `// for …` that do not pass linter for them being unmaintainable 
and fast to becoming incomplete or even incorrect.

Mention @dedmass

src/nvim/digraph.h

@@ -1,8 +1,8 @@
 #ifndef NVIM_DIGRAPH_H
 #define NVIM_DIGRAPH_H
 
-#include "nvim/types.h" // for char_u
-#include "nvim/ex_cmds_defs.h" // for exarg_T
+#include "nvim/types.h"
+#include "nvim/ex_cmds_defs.h"
 
 #ifdef INCLUDE_GENERATED_DECLARATIONS
 # include "digraph.h.generated.h"

src/nvim/eval/decode.c

@@ -755,9 +755,9 @@ json_decode_string_cycle_start:
         break;
       }
       case '"': {
-        if (parse_json_string(
-                buf, buf_len, &p, &stack, &container_stack,
-                &next_map_special, &didcomma, &didcolon) == FAIL) {
+        if (parse_json_string(buf, buf_len, &p, &stack, &container_stack,
+                              &next_map_special, &didcomma, &didcolon)
+            == FAIL) {
           // Error message was already given
           goto json_decode_string_fail;
         }

src/nvim/ex_cmds.h

@@ -6,8 +6,8 @@
 #include "nvim/os/time.h"
 #include "nvim/pos.h"
 #include "nvim/eval/typval.h"
-#include "nvim/buffer_defs.h" // for buf_T and win_T
-#include "nvim/ex_cmds_defs.h" // for exarg_T
+#include "nvim/buffer_defs.h"
+#include "nvim/ex_cmds_defs.h"
 
 // flags for do_ecmd()
 #define ECMD_HIDE            0x01    // don't free the current buffer

src/nvim/ex_getln.h

@@ -3,9 +3,9 @@
 
 #include "nvim/eval/typval.h"
 #include "nvim/ex_cmds.h"
-#include "nvim/ex_cmds_defs.h" // for exarg_T
-#include "nvim/os/time.h" // for Timestamp
-#include "nvim/regexp_defs.h" // for regmatch_T
+#include "nvim/ex_cmds_defs.h"
+#include "nvim/os/time.h"
+#include "nvim/regexp_defs.h"
 
 /* Values for nextwild() and ExpandOne().  See ExpandOne() for meaning. */
 #define WILD_FREE               1

src/nvim/fold.h

@@ -1,12 +1,12 @@
 #ifndef NVIM_FOLD_H
 #define NVIM_FOLD_H
 
-#include <stdio.h> // for FILE
+#include <stdio.h>
 
 #include "nvim/pos.h"
-#include "nvim/garray.h" // for garray_T
-#include "nvim/types.h" // for char_u
-#include "nvim/buffer_defs.h" // for win_T
+#include "nvim/garray.h"
+#include "nvim/types.h"
+#include "nvim/buffer_defs.h"
 
 /*
  * Info used to pass info about a fold from the fold-detection code to the

src/nvim/memfile_defs.h

@@ -3,10 +3,10 @@
 
 #include <stdint.h>
 #include <stdbool.h>
-#include <stdlib.h> // for size_t
+#include <stdlib.h>
 
 #include "nvim/types.h"
-#include "nvim/pos.h" // for linenr_T
+#include "nvim/pos.h"
 
 /// A block number.
 ///

src/nvim/move.h

@@ -2,8 +2,8 @@
 #define NVIM_MOVE_H
 
 #include <stdbool.h>
-#include "nvim/buffer_defs.h" // for win_T
-#include "nvim/pos.h" // for linenr_T
+#include "nvim/buffer_defs.h"
+#include "nvim/pos.h"
 
 #ifdef INCLUDE_GENERATED_DECLARATIONS
 # include "move.h.generated.h"