remove deprecated stuff from the stdlib; introduce better deprecation warnings

lib/packages/docutils/rst.nim

@@ -853,7 +853,6 @@ type
   DirKind = enum             # must be ordered alphabetically!
     dkNone, dkAuthor, dkAuthors, dkCode, dkCodeBlock, dkContainer, dkContents,
     dkFigure, dkImage, dkInclude, dkIndex, dkRaw, dkTitle
-{.deprecated: [TDirKind: DirKind].}
 
 const
   DirIds: array[0..12, string] = ["", "author", "authors", "code",
@@ -1114,7 +1113,6 @@ proc parseHeadline(p: var RstParser): PRstNode =
 
 type
   IntSeq = seq[int]
-{.deprecated: [TIntSeq: IntSeq].}
 
 proc tokEnd(p: RstParser): int =
   result = p.tok[p.idx].col + len(p.tok[p.idx].symbol) - 1
@@ -1408,8 +1406,6 @@ type
     hasArg, hasOptions, argIsFile, argIsWord
   DirFlags = set[DirFlag]
   SectionParser = proc (p: var RstParser): PRstNode {.nimcall.}
-{.deprecated: [TDirFlag: DirFlag, TDirFlags: DirFlags,
-              TSectionParser: SectionParser].}
 
 proc parseDirective(p: var RstParser, flags: DirFlags): PRstNode =
   ## Parses arguments and options for a directive block.

lib/packages/docutils/rstast.nim

@@ -70,8 +70,6 @@ type
                               ## the document or the section
     level*: int               ## valid for some node kinds
     sons*: RstNodeSeq        ## the node's sons
-{.deprecated: [TRstNodeKind: RstNodeKind, TRstNodeSeq: RstNodeSeq,
-              TRstNode: RstNode].}
 
 proc len*(n: PRstNode): int =
   result = len(n.sons)
@@ -99,7 +97,6 @@ type
   RenderContext {.pure.} = object
     indent: int
     verbatim: int
-{.deprecated: [TRenderContext: RenderContext].}
 
 proc renderRstToRst(d: var RenderContext, n: PRstNode,
                     result: var string) {.gcsafe.}