doc(nims): rm odd three std/

doc/nims.md

@@ -68,7 +68,7 @@ At least the following standard library modules are available:
 * [colors](colors.html)
 * [complex](complex.html)
 * [distros](distros.html)
-* [std/editdistance](editdistance.html)
+* [editdistance](editdistance.html)
 * [htmlgen](htmlgen.html)
 * [htmlparser](htmlparser.html)
 * [httpcore](httpcore.html)
@@ -86,7 +86,7 @@ At least the following standard library modules are available:
 * [punycode](punycode.html)
 * [random](random.html)
 * [ropes](ropes.html)
-* [std/setutils](setutils.html)
+* [setutils](setutils.html)
 * [stats](stats.html)
 * [strformat](strformat.html)
 * [strmisc](strmisc.html)
@@ -97,7 +97,7 @@ At least the following standard library modules are available:
 * [unicode](unicode.html)
 * [unidecode](unidecode.html)
 * [uri](uri.html)
-* [std/wordwrap](wordwrap.html)
+* [wordwrap](wordwrap.html)
 * [xmlparser](xmlparser.html)
 
 In addition to the standard Nim syntax ([system](system.html) module),